1. Sexual selection by male-male competition in natterjack toad choruses;Arak;Nature,1983
2. The evolution of courtship behavior in salamanders;Arnold,1972
3. Sexual behavior, sexual interference and sexual defense in the salamanders Ambystoma maculatum, Ambystoma tigrinum and Plethodon jordani;Arnold;Z. Tierpsychol.,1976
4. The evolution of courtship behavior in New World salamanders with some comments on Old World salamanders;Arnold,1977