Sakalauskas, Darius, and Aivaras Poška. “The Organization of Trade in Nemunas from the Riverhead Ports of the Radziwiłł and Sapieha Families in the 1760s and 1770s”. Lietuvos istorijos studijos 45 (July 21, 2020): 61–78. Accessed May 6, 2024. https://www.journals.vu.lt/lietuvos-istorijos-studijos/article/view/18869.