1. Columbia University Rare Book & Manuscript Library, MS X893.15 Z6 no.5 DS ID: DS19238 Title: Laws for slaughtering Place: ChełmPolandHalychUkraine Date: 5567 [1806 or 1807
2. Columbia University Rare Book & Manuscript Library, MS X893 Z8 v.2 no.1 DS ID: DS19277 Title: Responsa Author: Yaʻaḳov ben Meshulam Zalman Kortsman Place: Ukraine Date: 1865.