Worawut Rerkamnuaychoke, Narong Chungsamarnyart, Apinun Suprasert, and Boontham Chongcharoen. 1993. “The Arteriovenous Connection in the Spermatic Cord in the Variable Squirrel (Callosciurus finlaysoni)”. Agriculture and Natural Resources 27 (4). Bangkok, Thailand:520-24. https://li01.tci-thaijo.org/index.php/anres/article/view/241708.