Sur wikipedia voici ce qu'on trouve sur la formation nominal proto-indo-européenne
" in Leiden model there is a one to one correlation between the presence of the full grade vowel and the position of the accent, which indicates a historical connection between the two. At the stage when Leiden model was functional there was only one phonemic vowel, *e, which is always accented, and the new vowel *o, which is always unaccented, was in a complementary distribution.[34]"
Ou peut-on trouver des exemples de ce model ?