Jouventin, P.; Aubin, T.; Lengagne, T. (1999). „Finding a parent in a king penguin colony: the acoustic system of individual recognition”. Animal Behaviour. 57 (6): 1175—1183. PMID10373249. doi:10.1006/anbe.1999.1086.
Lormée, Hervé; Jouventin, Pierre; Chastel, Olivier; Mauget, Robert (1999). „Endocrine Correlates of Parental Care in an Antarctic Winter Breeding Seabird, the Emperor Penguin,Aptenodytes forsteri”. Hormones and Behavior. 35 (1): 9—17. PMID10049598. doi:10.1006/hbeh.1998.1491.
Jouventin, P.; Aubin, T.; Lengagne, T. (1999). „Finding a parent in a king penguin colony: the acoustic system of individual recognition”. Animal Behaviour. 57 (6): 1175—1183. PMID10373249. doi:10.1006/anbe.1999.1086.
Lormée, Hervé; Jouventin, Pierre; Chastel, Olivier; Mauget, Robert (1999). „Endocrine Correlates of Parental Care in an Antarctic Winter Breeding Seabird, the Emperor Penguin,Aptenodytes forsteri”. Hormones and Behavior. 35 (1): 9—17. PMID10049598. doi:10.1006/hbeh.1998.1491.