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  Freyhof, J. A. & Serov, D. V. 2000. Cobitis laoensis (Sauvage, 1878) from Vietnam with notes on the southern distribution limits of Indochinese Cobitis. Folia Zoologica, 49 (Suppl. 1): 205-214. (0.655)
  Freyhof, J., Ráb, P., & Bohlen, J. 2000. The valid names of some European species of the genus Cobitis (Teleostei, Cobitidae). Folia Zoologica, 49 (Suppl. 1), 3-7. (0.655)
  Freyhof, J. & Serov, D. V. 2000. Review of the genus Sewellia from Vietnam with descriptions of two new species (Cypriniformes: Balitoridae). Ichthyological Exploration of Freshwaters, 11: 217-240.