• University of Texas: Indo-European lexicon
• Proto-Indo-European etyma adapted from Indogermanisches etymologisches Wörterbuch of Julius Pokorny
• American heritage dictionary: Indo-European roots
• Indo-European and the Indo-Europeans by Calvert Watkins & Indo-European roots (2011)
• Indogermanisches Wörterbuch: Indo-European dictionary, by Gerhard Köbler
• Proto-Indo-European etymological dictionary by Fernando López-Menchero
• Fourteen Indo-European etymologies by Jouna Pyysalo, in Studia orientalia (2011)
• An Indo-European comparative dictionary by Stuart Mann (1984-1987)
• Indogermanisches etymologisches Wörterbuch: Indo-European etymological dictionary, by Julius Pokorny (1959)
• Dictionnaire des racines des langues européennes by Robert Grandsaignes d'Hauterive (1948) 
• Vergleichendes Wörterbuch der indogermanischen Sprachen by August Fick (1894): I & II - III
• Rock art and Celto-Germanic vocabulary: shared iconography and words as reflections of Bronze Age contact, by John Koch, in Adoranten (2019)
• Ethnozoonymes indo-européens (names of peoples derived from animal names) by Bernard Sergent, in Dialogues d'histoire ancienne (1991)
• Couleur et teinture chez divers peuples indo-européens (color and dyeing) by Lucien Gerschel, in Annales - économies, sociétés, civilisations (1966)
• Le nom indo-européen de l'hôte (host) by Romain Garnier (2012)
• studies about the Indo-European languages, by Rémy Viredaz
• Léger et court en indo-européen (light & short), in Wékwos (2019)
• Le nom du gendre en indo-européen et en balto-slave (son-in-law), in Indogermanische Forschungen (2002)
• Six en indo-européen, in Indogermanische Forschungen (1997)
• En amont de l'indo-européen : les enseignements eurasiatiques de Joseph Greenberg et de quelques vieux hydronymes, by Jean-Pierre Levet (2006)
• La racine verbale *dʰeh₁- « verbe support » : de l'indo-européen aux prolongements latins, by Jean-Paul Brachet, in Revue de philologie, de littérature et d'histoire anciennes (2003)
• L'indoeuropeo *ter- « frotar » en las lenguas romances (to rub) by Julian Santano Moreno, in Nouvelle revue d'onomastique (2005)
• La familia del indoeuropeo *tēu- « hincharse » en las lenguas romances y en vasco (to swell) (2004)
• Indoeuropeo *(s)lei- « viscoso » en las lenguas romances (2008)
• Indoeuropeo *keu- « torcer » en las lenguas romances y en vasco (2009)
• Descendientes de indoeuropeo *(s)kerb(h)- y *kar- « torcer » y « duro » en las lenguas romances y el vasco (2003)
• Un derivado romance y vasco de indoeuropeo *reik- : historia y semántica (2002)
• Several Indo-European words for dense and their etymologies by Tijmen Pronk, in Journal of Indo-European Studies (2013)
• studies about the Indo-European languages, by Jón Axel Harðarson
• Germanisch *truwa-, *trewwa- und *-trewwija- und ihre urindogermanischen Grundlagen, in Studien zur historisch-vergleichenden Sprachwissenschaft (2018)
• Das Wort für Eisen im Keltischen und Germanischen und die indogermanischen -erno-Bildungen, in Das Nomen im Indogermanischen (2011)
• Das urindogermanische Wort für Frau (the Proto-Indo-European word for the woman), in Münchener Studien zur Sprachwissenschaft (1987)
• The Proto-Indo-European word for salt: from inflexion to derivation, by Michiel de Vaan, in Acta linguistica petropolitana (2022)
• On the homonymy of put and suck in Proto-Indo-European, in Indo-European Linguistics (2019)
• Proto-Indo-European *sm and *si ("one"), in The precursors of Proto-Indo-European (2019)
→ Indo-European Keyboard to type a text with the special characters of the Latin alphabet
• The Indo-European languages by Mate Kapović (2017)
• L'indo-européen by Jean Haudry (1979)
• University of Texas: Indo-European languages & historical linguistics
• Proto-Indo-European phonology by Winfred Lehmann (1951)
• Proto-Indo-European syntax by Winfred Lehmann (1974)
• A reader in 19th historical Indo-European linguistics by Winfred Lehmann (1967)
• Indo-European linguistics,an introduction, by James Clackson (2007)
• Indo-European language and culture, an introduction, by Benjamin Fortson (2004)
• Indo-European linguistics by Michael Meier-Brügger (2003)
• Introduction to Indo-European linguistics by Oswald Szemerényi (1996)
• Introduction to the history of the Indo-European languages by Vladimir Georgiev (1981)
• An Indoeuropean classification: a lexicostatistical experiment, by Isidore Dyen, Joseph Kruskal & Paul Black (1992)
• Indo-European personal pronouns: limits of their internal reconstruction, by Lenka Bičanová & Václav Blažek, in Linguistica brunensia (2014)
• Indo-European /a/ by William Wyatt (1970)
• A phonological study of the Indo-European laryngeals by Alan Keiler (1970)
• Grammar of Modern Indo-European by Carlos Quiles & Fernando López-Menchero (2009)
• Kurze vergleichende Grammatik der indogermanischen Sprachen: comparative grammar of the Indo-European languages, by Karl Brugmann (1904)
• Compendium of the comparative grammar of the Indo-European, Sanskrit, Greek and Latin languages, by August Schleicher (1874): I & II
• Compendium der vergleichenden Grammatik der indogermanischen Sprachen by August Schleicher (1856)
• Compendio di grammatica comparativa dello antico indiano, greco ed italico, by Augusto Schleicher & Lessico delle radici indo-italo-greche by Leone Meyer (1869)
• The negatives of the Indo-European languages, by Frank Hamilton Fowler (1896)
• Lezioni di fonologia comparata del sanscrito, del greco e del latino, by Graziadio Isaia Ascoli (1870)
• Der indogermanische Akzent: The Indo-European accent, by Herman Hirt (1895)
• Der indogermanische Ablaut: The Indo-European apophonia, by Herman Hirt (1900)
• Indo-Aryan from the Vedas to modern times, by Jules Bloch (1934, 1965)
• Les langues de l'Europe moderne by August Schleicher (1852)
• Die Sprachen Europas in systematischer Übersicht, by August Schleicher (1850)
• Introduction à l'étude comparative des langues indo-européennes by Antoine Meillet (1908)
• Les dialectes indo-européens (1908)
• La langue latine étudiée dans l'unité indo-européenne, histoire, grammaire, lexique, by Amédée Caix de Saint-Aymour (1868)
• Essai sur la langue et la philosophie des Indiens by Frédéric Schlegel (1838)
• Über die Sprache und Weisheit der Indier by Friedrich von Schlegel (1808)
• Semitisch und indogermanisch by Hermann Möller (1907)
