Rikhsibaev U.T. РУ, K. Malikov К. Theorem of Gauss and Polke-Schwarz as the main theorem of the parallel rectangular projection of the axonometric system. prengpe [Internet]. 2022 Dec. 28 [cited 2024 Nov. 23];49(4):5. Available from: https://bulprengpe.enu.kz/index.php/main/article/view/202