Yigael Yadin, The Finds from the Bar Kokhba Period in “The Cave of the Letters” (Jerusalem, 1963) (Hebrew); Yigael Yadin, Bar Kokhba (London, 1971). Aaron Kirschenbaum, “Concerning the Requirement of White in sisith,” Studies in Judaism, David Kotler Jubilee Volume (Tel Aviv, 1976), pp. 246–52.
