1. of Microbiological Societies Subcommittee on the Taxonomy of Leptospira. Revised list ofLeptospira serovars;International Union,1988
2. Turner LH. Leptospirosis. BMJ 1969;i:231-5.
3. Placebo-controlled trial of intravenous penicillin for severe and late leptospirosis;Watt, G.; Padre, L.P.; Tuazon, L.;Lancet,1988
4. Rats-the new plague;Golding, C.,1990