Chobanov G, Chobanov I. LAGRANGE OR EULER? PART TWO: THE PRESENT. Ann. Sofia Univ. Fac. Math. and Inf. [Internet]. 1991 Dec. 12 [cited 2024 Nov. 24];82(2):5-62. Available from: https://ftl5.uni-sofia.bg./index.php/fmi/article/view/537