Blue MG, Wittkopp RW (July 1981). "Clinical and structural features of equine enteroliths". Journal of the American Veterinary Medical Association. 179 (1): 79–82. doi:10.2460/javma.1981.179.01.79. PMID7251465.
Blue MG, Wittkopp RW (July 1981). "Clinical and structural features of equine enteroliths". Journal of the American Veterinary Medical Association. 179 (1): 79–82. doi:10.2460/javma.1981.179.01.79. PMID7251465.