Almeida, Jorge, Petra E. Pajtas, Bradford Z. Mahon, Ken Nakayama, and Alfonso Caramazza. 2012. “Affect of the Unconscious: Visually Suppressed Angry Faces Modulate Our Decisions.” Cognitive, Affective, & Behavioral Neuroscience 13 (1) (December 6): 94–101. doi:10.3758/s13415-012-0133-7.
Pizzagalli, Diego A., Anne E. Evins, Erika Cowman Schetter, Michael J. Frank, Petra E. Pajtas, Diane L. Santesso, and Melissa Culhane. 2008. Single dose of a dopamine agonist impairs reinforcement learning in humans: Behavioral evidence from a laboratory-based measure of reward responsiveness. Psychopharmacology 196, no. 2: 221-232.