REFERENCES
- Arntzen, J. W., Sparreboom, M. (1989) J. Zool., London, 219, 645–664.
- Arntzen, J. W., Themudo, G. E., Wielstra, B. (2007) Contribution to Zoology, 76(4), 261–278.
- Ivanović A., Sotiropoulos K., Furtula M., Džukić G., Kalezić M. (2008) J Zool Syst Evol Res, 46(4), 381–387.
- Kalezić M., Crnobrnja J., Dorović G., Džukić G. (1992) Alytes, 10(3), 63–80.
- Malmgrem, J. C., Thollesson, M. (1999) J. Zool., London, 249, 127–136.
- Naumov B., Tzankov N. (2008) Historia naturalis bulgarica, 19, 111–114.
- Shine, R. (1989) Q Rev Biol, 64, 419–461.
- StatSoft. Inc. (2004) STATISTICA (data analysis sofware system) version 7. www.statsoft.com.
- Tzankov N., Stoyanov A. (2008) Salamandra, 44(3), 153–162.