1. Mitsuhashi S:Transferable drug resistance factor R, University of Tokyo Press, Tokyo; University Park Press, Baltimore 1971 p 1
2. Arya D, Chitkara NL, Agarwal KC, Ganguly NK:Indian J Pathol Microbiol 20: 15, 1977
3. Panikar CKJ, Vimla KN, Bhat P, Stephen S:Indian J Med Res 68: 413, 1978
4. Kaliyugaperumal, Gupta U, Mohapatra LN:Indian J Med Res 68: 220, 1978
5. Macaden R, Gokul BN, Pereira P, Bhat P:Indian J Med Res 71: 178, 1980