S Y Chinn, J D Willson, Daniel A Cristol, D V.V. Drewett, et al.. "High levels of maternally transferred mercury do not affect reproductive output or embryonic survival of northern watersnakes (Nerodia sipedon)" Environmental Toxicology & Chemistry Vol. 32 Iss. 3 (2013) p. 619 - 626
Available at: http://works.bepress.com/daniel-cristol/17/