Kozhamkulov Т.A., A.G. Murzagalieva, and P.N. Kim. 2008. “MINKOWSKI WORLD IN SPECIAL THEORY OF RELATIVITY AND 3-DIMENTIONAL GEOMETRY OF LOBACHEWSKI”. Recent Contributions to Physics 2008 (2):5-10. https://bph.kaznu.kz/index.php/zhuzhu/article/view/1437.