Smaers JB, Gomez-Robles A, Parks AN, Sherwood CC. Exceptional evolutionary expansion of the prefrontal cortex in great apes and humans. Current Biology. 27: 714-720.
Parks AN, Smaers JB. The evolution of the frontal lobes in primates. In: Digital Endocasts (from skulls to brains)(Edited by E. Bruner). Springer, pp. 205-218.