Christov, Christo, and Rossitza Marinova. 1998. “NUMERICAL SOLUTIONS FOR STEADY FLOW PAST A CIRCULAR CYLINDER VIA THE METHOD OF VARIATIONAL IMBEDDING”. Ann. Sofia Univ. Fac. Math. And Inf. 90 (December):177-89. https://annual.uni-sofia.bg/index.php/fmi/article/view/295.