1. AKAMA, K., OTANI, S., MORI, M. AND ARIMITSU, Y. (1975) : Studies on the potency test of antiserum for Weil's disease by the intracutaneous method. Japan. J. Med. Sci. Biol., 28, 1-9.
2. BORG-PETERSEN, C. (1938) : Leptospirenuntersuchungen in Dänemark. In: Acta Conventus Tertii de Tropicis atque Malariae Morbis, Amsterdam, Vol. 1, p. 396-406.
3. KEMENES, F. (1964) : Cross-immunity studies on virulent strain of leptospirer belonging to different serotypes. Z. Immunitäts-Allergieforsch., 127, 209-229.
4. KMETY, E. (1963) : Factor analysis of leptospira strains of the Javanica and Celledoni serogroups. J. Hyg. Epidemiol. Microbiol. Immunol. (Praha) , 7, 225-239.
5. MORI, M., ARIMITSU, Y., OTANI, S. AND AKAMA, K. (1974) : Intracutaneous infectoin with Leptospira icterohaemorrhagia (Shibaura strain) of the guinea pig. Japan. J. Med. Sci. Biol., 27, 297-308.