Chobanov, G. and Chobanov, I. (1991) “LAGRANGE OR EULER? PART TWO: THE PRESENT”, Ann. Sofia Univ. Fac. Math. and Inf, 82(2), pp. 5–62. Available at: https://annual.uni-sofia.bg/index.php/fmi/article/view/537 (Accessed: 25 November 2024).