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CEI, José Miguel (1972) - Precipitin tests and taxo-serological status of some european toads of Bufo bufo group. Arquivos do Museu Bocage, III (14): 385-393. Amphibia.

CEI, J.M. (1973) - Geographical barriers and serological relationships in some African toads of the Bufo regularis complex. Arquivos do Museu Bocage, IV (10): 233-245. Amphibia.

CEI, J. M. (1977) - Chaves para uma identificação preliminar dos Batráquios Anuros da R.P. de Angola. Boletim Soc. Port. Ciênc. Nat., 17: 5-26. Amphibia.

CEI, J.M. & CRESPO, E.G. (1971) - Remarks on some adaptive ecological trends of Pelobates cultripes from Portugal: thermal requirement, rate of development and water regulation. Arquivos do Museu Bocage, III (2): 9-36. Amphibia.

CEI, J.M. & CRESPO, E.G. (1982) - Differences in larval morphology of allopatric isolated populations of the Odontophrynus occidentalis Group from Western Argentina. Arquivos do Museu Bocage, A, I (14): 335-340. Amphibia.