Horodezki, Le-Korot ha-Rabbanut, Warsaw, 1911, containing the biographies of Moses Isserles, Solomon Luria, Mordecai Joffe, Meir of Lublin, Samuel Edels, and others.
----, "Rabbi Nathan Shapiro, a Kabbalist of the Seventeenth Century," Yevr. St., 1910, pp. 192 et seq.
----, "The Age of the Ascetic Kabbalah" (Isaiah Horvitz and his family), Yevr. St., 1913, pp. 145, 367, 455.
Rabbinovich, "Traces of Free-thinking in Polish Rabbinism of the Sixteenth Century," Yevr. St., 1911, p. 1 et seq.
Warchel, "Polish Jews at the University of Padua," Kwartalnik historyi Żydow ("Jewish Historical Quarterly"), Warsaw, 1913, No. 3.
Bruckner, "From the History of Polish Dissidents," Ateneum, Warsaw, 1898, No. 2.
Isaac Troki, Hizzuk Emunah, edited with German translation by D. Deutsch, Breslau, 1873.
Chapter V
The Autonomous Center in Poland During Its Decline
(pp. 139-187)