And Rabbi Akiva Laughed...., Great Leaders of our People: Akiva, Jewish Encyclopedia: Akiba Ben Joseph, Jewish Virtual Library: Rabbi Akiba (Akiva) ben Jo, Rabbi Akiva, Rabbi Akiva: From Shepherd to Scholar

Baal Shem Tov Foundation, Jewish Virtual Library: Rabbi Yisrael Baal Shem To, The Baal Shem Tov

Great Leaders of our People: Hillel, Hillel, Hillel and the Three Kinds of Students, Jewish Encyclopedia: Hillel, Jewish Virtual Library: Hillel and Shammai, Rabbi Hillel

Great Leaders of our People: Rabbi Yehudah HaNasi, Jewish Encyclopedia: Judah I, Judah Hanasi

Lubavitcher Rebbe Sholem Dov Ber Schneerson, Menachem Mendel Schneerson - Wikipedia, The Rebbe's Ohel, The Rebbe, the Messiah, and the Heresy Hunter, The Rebbe: His Wisdom, His Life, TheRebbe.org

Great Leaders of our People: Moshe Ben Nachman, Jewish Encyclopedia: Moses ben Nachman Gerondi, Jewish Virtual Library: Nachmanides, RaMBaN

Great Leaders of our People: Rashi, Jewish Encyclopedia: Rashi (Solomon Bar Isaac), Jewish Virtual Library: Rashi, Project Gutenberg Edition of Rashi, Rashi, Rashi Yomi, Rashi's Commentary on the Talmud

Great Leaders of our People: Rabbi Yochanan ben Za, Jewish Encyclopedia: Johanan ben Zakkai, Rabbi Yochanan ben Zakkai, Yochanan Ben Zakkai Sets up Yavneh

Great Leaders of our People: Joseph Caro, Jewish Encyclopedia: Joseph ben Ephraim Caro, Jewish Virtual Library: Joseph Caro, Rabbi Yosef Karo