Solway*, Alec, Carlos Diuk*, Natalia Córdova, Debbie Yee, Andrew Barto, Yael Niv, and Matthew Botvinick. (2014) 2014. “Optimal Behavioral Hierarchy”. PLoS Computational Biology 10 (8): e1003779. doi:10.1371/journal.pcbi.1003779.

Diuk, Carlos, Anna Schapiro, Natalia Córdova, José Ribas-Fernandes, Yael Niv, and Matthew Botvinick. 2013. Divide and Conquer: Hierarchical Reinforcement Learning and Task Decomposition in Humans. Computational and Robotic Models of the Hierarchical Organization of Behavior. Vol. 9783642398. doi:10.1007/978-3-642-39875-9_12.