Feit, Julia, Edward Jacek Gorzelańczyk, Ewa Mrówczyńska, Ewelina Nowińska, and Katarzyna Pasgreta. 2012. “Effect of a Single Dose of Methadone on the Functioning of Visuo-Spatial Working Memory in Opiate Dependent Individuals With HIV(+) Treated With Methadone”. Medical and Biological Sciences 26 (2):5-9. https://doi.org/10.12775/v10251-012-0028-4.