9Korycka-Dahl M, Richardson T, Bradley R L. Use of microbial beta-lactamase to destroy penicillin added to milk. J Dairy Sci, 1985, 68 (8) : 1910-1916.
10CAC/RCP 45-1997. CODE OF PRACTICE FOR THE RE- DUCTION OF AFLATOXIN B1 IN RAW MATERIALS AND SUPPLEMENTAL FEEDINGSTUFFS FOR MILK- PRODUCING ANIMALS[S] .