1.
Arushanyan O, Zaletkin S. To the orthogonal expansion theory of the solution to the Cauchy problem for second-order ordinary differential equations. Num. Meth. Prog. [Internet]. 2018 May 2 [cited 2024 Apr. 26];19(56):178-84. Available from: https://en.num-meth.ru/index.php/journal/article/view/963