Sabaitis, Deividas, Vytautas Giniotis, Mindaugas Rybokas, and Gintaras Dmitrijev. “Peculiarities of Producing and Measuring Circular Scales”. Geodesy and Cartography 37, no. 3 (November 1, 2011): 125-128. Accessed January 28, 2022. https://journals.vgtu.lt/index.php/GAC/article/view/5412.