Slovo i tekst v srednevekovoĭ kulʹture, 1994 leaf facing t.p. (Abaelardus [in rom.]) p. 22 (Petr Abeli︠a︡r)
New Grove (Abelard, Peter (Petrus Abailardus, Abaelard, Abailard); b. 1079, Le Pallet, near Nantes, d. Apr. 21, 1142, St-Marcel, near Chalon-sur-Saône; French philsopher, poet and musician of Breton origin)
Lehotka, Gábor. Sabbato ad vesperas hymnus, c2004 caption (Petri Abaelardi)