Kalezic M. L., Dzukic G., Tvrtkovic N., 1990: Newts (Triturus, Salamandridae, Urodela) of the Bukovica and Ravni Kotari regions (Yugoslavia). 10 pp. Spixiana 13(3): 329-338.

 Kalezić M. L., Džukić G., Djorović A., Aleksić I., 2000: Body size, age and sexual dimorphism in the genus Salamandra. A study of the Balkan species (Amphibia, Urodela, Salamandridae). 10 pp. Spixiana 23(3): 283-292.

 Kammel W., 2015: Verbreitung, Bestandssituation und Lebensraumansprüche der Würfelnatter (Natrix tessellata Laurenti, 1768) in der Steiermark. 22 pp. Joannea Zoologie 14: 37-58.

 Karunarathna Suranjan D. M. S., Amarasinghe Thasun A. A., Stöckli E., 2009: Taxonomic and biological study on Calotes ceylonensis Müller, 1887 (Reptilia: Agamidae) of Sri Lanka. 10 pp. Bonner zoologische Beiträge 56(2008)(4): 229-238.

 Keirans J. E., 1985: Amblyomma antillorum Kohls, 1969 (Acari: Ixodidae): description of the immature stages from the rock iguana, Iguana pinguis (Sauria: Iguanidae) in the British Virgin Islands. 5 pp. Proc. Entomol. Soc. Wash. 87(4): 821-825.

 Klausewitz W., 1954: Eidonomische, taxonomische und tiergeographische Untersuchungen über den Rassenkreis der Scinciden Chalcides chalcides und Ch. striatus. 17 pp. [81045] Senckenbergiana biologica 34(4-6): 187-203.

 Köhler J., 2000: A new species of Phyllonastes Heyer from the Chapare region of Bolivia, with notes on Phyllonastes carrascoicola (Amphibia, Anura, Leptodactylidae). 7 pp. [REP129] Spixiana 23(1): 47-53.

 Köhler J., Glaw F., Vences M., 1997: First record of Mabuya comorensis (Reptilia: Scincidae) for the Madagascan fauna, with notes on the reptile fauna of the offshore island Nosy Tanikely. 8 pp. (in English). Bolletino del Museo regionale di Scienze Naturali – Torino 15(1): 75-82.

 Köhler J., Güsten R., 2007: Herpetological type specimens in the natural history collections of the museums in Darmstadt and Wiesbaden, Germany. 14 pp. Spixiana 30(2): 275-288.

 Köhler J., Lötters S., 1999: Annotated list of amphibian records from the Departamento Pando, Bolivia, with description of some advertisement calls. 15 pp. Bonner zoologische Beiträge 48(3-4): 259-273.

 Krause P., Böhme W., 2010: A new chameleon of the Trioceros bitaeniatus complex from Mt. Hanang, Tanzania, east Africa (Squamata: Chamaeleonidae). 11 pp. Bonn zoological Bulletin 57(1): 19-29.

 Krupp F., Schneider W., 1989: The fishes of the Jordan River Drainage Basin and Azraq Oaisis. 70 pp. Fauna of Saudi Arabia 10: 347-416.