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Guzman, Alvaro, Kelly J. Rohan, Samina M. Yousufi, Minh-Chau Nguyen, Michael A. Jackson, Joseph J. Soriano, a Teodor T. Postolache. "Mood Sensitivity to Seasonal Changes in African College Students Living in the Greater Washington D.C. Metropolitan Area." ScientificWorldJournal 2007.

Guzman, Alvaro, et al. "Mood Sensitivity to Seasonal Changes in African College Students Living in the Greater Washington D.C. Metropolitan Area." ScientificWorldJournal 2007.