Žąsinaitė-Gedminienė, J. 2010. Universal Time counters of the Grand Duchy of Lithuania in the second half of the 18th century: Vilnius and Grodno Calendars. Literatūra. 52, 1 (Jan. 2010), 7–19. DOI:https://doi.org/10.15388/Litera.2010.1.7713.