1. Beitrag zur vergleichenden Anatomie des Säugethier-Kehlkopfes;Albrecht;SB Kais. Akad. Wiss., Math. Naturwiss. Cl.,1896
2. Sexual selection. Monographs in behavior and ecology;Andersson,1994
3. Reproductive and social behaviour in the Northern elephant seal;Bartholomew;Univ. Calif. Publ. Zool.,1952
4. A model for evolution of the pinniped polygyny;Bartholomew;Evolution,1970
5. The role of vocalization in the social behaviour of the northern elephant seal;Bartholomew;Anim. Behav.,1962