^ abcdMiller, Mary; Taube, Karl (1993). “Tohil”. The Gods and Symbols of Ancient Mexico and the Maya: An Illustrated Dictionary of Mesoamerican Religion. Thames & Hudson. p. 170. ISBN0500050686(日本語訳:『図説マヤ・アステカ神話宗教事典』東洋書林、2000年)
^Read, Key Almere; González, Jason J. (2000). Handbook of Mesoamerican Mythology. ABC-CLIO, Inc. p. 90. ISBN0874369983
^Kelly, Joyce (1996). “Utatlán”. An Archaeological Guide to Northern Central America: Belize, Guatemala, Honduras, and El Salvador. University of Oklahoma Press. p. 200. ISBN0806128615