↑2.02.12.2De Vaan, Michiel (2008), “pungō”, inEtymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill,→ISBN,page499: “*pu-n(e)g/k-”
^Mallory, J. P. withAdams, D. Q. (2006), “*peug- 'prick, poke'”, inThe Oxford Introduction to Proto-Indo-European and the Proto-Indo-European World (Oxford Linguistics), New York: Oxford University Press,→ISBN,page377
^Le Mair, Esther (30 September 2011),Secondary Verbs in Old Irish: A comparative-historical study of patterns of verbal derivation in the Old Irish Glosses, Galway: National University of Ireland, page256
^Stüber, Karin (1998),The Historical Morphology ofn-Stems in Celtic (Maynooth studies in Celtic linguistics; III), Department of Old Irish, National University of Ireland, Maynooth,→ISBN, page77