^ Boulenger, GA (1893).大英博物館(自然史)所蔵ヘビ目録. 第1巻, 科…Colubridæ Aglyphæ, part.ロンドン: 大英博物館(自然史)管理委員会. (Taylor and Francis, 印刷). xiii + 448 pp. + 図版 -XXVIII. ( Tropidonotus cyclopium [sic], pp. 244-245).
^ a b Schmidt, KP , and DD Davis (1941). Field Book of Snakes of the United States and Canada . New York: GP Putnam's Sons. 365 pp. ( Natrix cyclopion cyclopion、pp. 215-216、図70 + 図23、上部、p. 343).
^ a b Stejneger, L. , T. Barbour (1917). 『北米両生類・爬虫類チェックリスト』マサチューセッツ州ケンブリッジ: ハーバード大学出版局. 125 pp. ( Natrix cyclopion , pp. 94-95).
^ a b Wright, AH , and AA Wright (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock Publishing Associates a division of Cornell University Press. 1,105 pp. (in 2 Volumes). ( Natrix cylopion cyclopion , pp. 472-475, Figure 139 + Map 38 on p. 467).
^ a b Conant, R., W. Bridges (1942). What Snake Is That? A Field Guide to the Snakes of the United States East of the Rocky Mountains . (with 108 drawings by Edmond Malnate ). New York and London: D. Appleton-Century. 口絵地図 + viii + 163ページ + 図版AC, 1-32. ( Natrix cyclopion cyclopion , pp. 90-91).