Baranetskij YO. DIRICHLET PROBLEM FOR DIFFERENTIAL EQUATIONS OF EVEN ORDER OPERATOR COEFFICIENTS THAT CONTAIN AN INVOLUTION: Array. Number [Internet]. 2018 Dec. 14 [cited 2024 Apr. 23];(2(46):26-37. Available from: https://pvntsh.nung.edu.ua/index.php/number/article/view/371