Pladevall, J., Mendes, N., Riba, D., Llorente, M., & Amici, F. (2020). No evidence of what-where-when memory in great apes (Pan troglodytes, Pan paniscus, Pongo abelii, and Gorilla gorilla). Journal of Comparative Psychology, 134(2), 252-261. doi:10.1037/com0000215.