(1)
Costa, E.; Lopes, A. A.; Sacramento, E.; Costa, Y. A.; Matos, E. D.; Lopes, M. B.; Bina, J. C. Penicillin at the Late Stage of Leptospirosis: A Randomized Controlled Trial . Rev. Inst. Med. Trop. São Paulo 2003, 45 (3), 141-145.