1. Cheville NF: 1988, Introduction to veterinary pathology, p. 425. Iowa State University Press, Ames, IA.
2. Cotran RS, Kumar V, Robbins SL: 1989, Robbins pathologic basis of disease, 4th ed., pp. 503–504. W. B. Saunders Co., Toronto, ON.
3. Electrocution of pigs
4. Gracey JF: 1986, Meat hygiene, 8th ed., pp. 138–142. Balliere Tindall, Toronto, ON.