Rapid characterization of mixed microbial populations in ruminal contents, cecal contents and in feces by a semi-quantitative assay of some hydrolytic enzymes (APIZYME)
Z Tierphysiol Tierernahr Futtermittelkd. 1979 Feb;41(3):162-71.
doi: 10.1111/j.1439-0396.1978.tb00578.x.