What is a Soul? III (1). The Many Souls of Man—Nefesh HaBahamit—The Animal Soul
From the blog of Alexander I. Poltorak at The Times of Israel
Vilniaus Apskritis Ha Afon Shabbos Parshas Vayishlach Sefer Hasichos Josephi Schneersohn Chabad Lubavitch
Source: timesofisrael.com