Corrêa, Rodrigo Romero, et al. “Retrospective Study of Enterolithiasis and Foreign Bodies Found in the Large Intestine of Horses (january 1993 to January 2003)”. Brazilian Journal of Veterinary Research and Animal Science, vol. 43, no. 2, Apr. 2006, pp. 242-9, https://doi.org/10.11606/issn.1678-4456.bjvras.2006.26505.