LitvinO. (1992) “Interlination of the functions of 2 variables on $M (M\geq2)$ straight lines with the highest algebraic accuracy ”, Ukrains’kyi Matematychnyi Zhurnal, 44(11), pp. 1498-1504. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8251 (Accessed: 27July2024).