Mihova, Vesselka, and Georgi Ganchev. “PARTIAL DIFFERENTIAL EQUATIONS OF TIME-LIKE WEINGARTEN SURFACES IN THE THREE-DIMENSIONAL MINKOWSKI SPACE”. Ann. Sofia Univ. Fac. Math. and Inf. 101 (December 12, 2013): 143–165. Accessed November 15, 2024. https://annual.uni-sofia.bg/index.php/fmi/article/view/236.