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| | Amphibian Species of the World - Bombina Oken, 1816 (Site not responding. Last check: 2007-10-25) |
 | | Biochem., 63: 517-519, compared immunologically and discussed relationships of Bombina bombina, Bombina orientalis, and Bombina variegata. |
 | | See Nöllert, 1996, Naturschutz Rep., 11: 1-260, for summaries of biology and ecology of Bombina variegata, Bombina pachypus, and Bombina bombina in Europe. |
 | | Bonn., : 161-168, discussed the relationships and interspecific variation of the members of Grobina (Bombina maxima, Bombina microdeladigitora, and Bombina fortinuptialis). |
| research.amnh.org /herpetology/amphibia/references.php?g_id=25 (342 words) |
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