S.Y. ʿAgnon u-meḳorotaṿ ha-ḥasidiyim : ʿiyun be-arbaʿah mi-sipuraṿ = S.Y. Agnon and his Hasidic sources - Nigʾal, Gedalyah (Verfasser) (Mekhon Ḳurtsṿail, Universiṭat Bar-Ilan, 1983)