Losin, E. A., et al. 2012. Own-gender imitation activates the brain's reward circuitry.
Ludwig, A. M. 2002.
Luef, E. M., T. Breuer, and S. Pika. 2016. Food-associated calling in gorillas (Gorilla g. gorilla) in the wild.
Lundström, J. N., et al. 2013. Maternal status regulates cortical responses to the body odor of newborns.
Lutchmaya, S., and S. Baron-Cohen. 2002. Human sex differences in social and non-social looking preferences, at 12 months of age.
Maccoby, E. E. 1998.
MacDonald, K., and R. D. Parke. 1986. Parent-child physical play: The effects of sex and age of children and parents.
Maerker, A. 2005. Scenes from the museum: The hermaphrodite monkey and stage management at La Specola.
Maestripieri, D., and S. Pelka. 2002. Sex differences in interest in infants across the lifespan: A biological adaptation for parenting?
Maggioncalda, A. N., N. M. Czekala, and R. M. Sapolsky. 2002. Male orangutan subadulthood: A new twist on the relationship between chronic stress and developmental arrest.