Lifshits, Yosef Yitsḥaḳ. <i>"uvi-yeme Ha-ḳadmonim" : Ha-hitpatḥut Ha-halakhah Ha-ashkenazit: Masoret, Ha-ṭeḳsṭ Ha-talmudi Ṿeha-ḥayim Ba-ʻir Shel Yeme Ha-benayim = In Time Immemorial : the Development of Ashkenazi Law.</i> Tel Aviv: Idra, 7832.