Doina Vasilca. "COMPARISON BETWEEN THE 1970 STEREOGRAPHIC PROJECTION AND A DOUBLE-STEREOGRAPHIC PROJECTION." SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th International Multidisciplinary Scientific GeoConference SGEM2019, Informatics, Geoinformatics and Remote Sensing (2019): 749-756. https://doi.org/10.5593/sgem2019/2.2/s11.092