Klausner, Novo Yevreyskaya Literatura, Warsaw, 1900.
Kohen, Megillah 'Afah, in Aben Virga, Shebet Yehudah, ed. Wiener, Hanover, 1856.
Kohn, Hut ha-Meshullash, Odessa, 1874.
Kovner, Heker Dabar, Warsaw, 1865.
Kovner, Zevov Perahim, Odessa, 1868.
Kunz, Die Philosophie Salomon Maimons, Heidelberg, 1912.
Lapin, Keset ha-Sofer, Berlin, 1857.
Lebensohn, Emet we-Emunah, Vilna, 1867, 1870.
Lebensohn, Kiryat Soferim, Vilna, 1847.
Leket Amarim, supplement to Ha-Meliz, St. Petersburg, 1887.