This article incorporates text from a publication now in the public domain: Singer, Isidore; et al., eds. (1901–1906). "Zebaḥim". The Jewish Encyclopedia. New York: Funk & Wagnalls. /wiki/Public_domain ↩
Epstein, Isidore, ed. (1948). "Introduction to Seder Kodashim". The Babylonian Talmud. Vol. 5. Singer, M.H. (translator). London: The Soncino Press. pp. xvii–xxi. /wiki/Isidore_Epstein ↩