BARANETSKIJ, Y. O. DIRICHLET PROBLEM FOR DIFFERENTIAL EQUATIONS OF EVEN ORDER OPERATOR COEFFICIENTS THAT CONTAIN AN INVOLUTION: Array. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, [S. l.], n. 2(46), p. 26–37, 2018. DOI: 10.31471/2304-7399-2018-2(46)-26-37. Disponível em: https://pvntsh.nung.edu.ua/index.php/number/article/view/371. Acesso em: 23 apr. 2024.