Fullerton FR , Kushmaul RJ, Suber RL & Littlefield NAInfluence of oral administration of sulphamethazine on thyroid hormone levels in Fischer 344 rats. Journal of Toxicology and Environmental Health1987; 22: 175-85.
2.
Littlefield NA, Gaylor DW, Blackwell B-N. & Allen RRChronic toxicity/carcinogenicity studies of sulphamethazine in B6C3F1 mice. Food and Chemical Toxicology1989; 27: 455-63.
3.
Brown J.Big stores ban pork linked to cancer scare drug. The Sunday Telegraph1988, 21 February.