Domain-Dependent Option Policies in Autonomous Robot Learning. - Letícia Maria Friske; Carlos H. C. Ribeiro (SCCC, 2001)

Speeding Up Autonomous Learning by Using State-Independent Option Policies and Termination Improvement. - Letícia Maria Friske; Carlos H. C. Ribeiro (SBRN, 2002)

Experiments on the use of option policies in reinforcement learning. - Letícia Maria Friske; Carlos H. C. Ribeiro (J. Intell. Fuzzy Syst., 2002)

Planning Under Uncertainty with Abstraction Hierarchies. - Letícia Maria Friske; Carlos H. C. Ribeiro (IDEAL, 2006)

HPGP: An Abstraction-Based Framework for Decision-Theoretic Planning. - Letícia Maria Friske; Carlos H. C. Ribeiro (IDEAL, 2007)