Khoma, N. H., Khoma-Mohylska, S. H., & Khokhlova, L. H. (2020). NEW STATEMENT OF BOUNDARY-VALUE 2Π-PERIODIC PROB-LEM FOR THE HYPERBOLIC SECOND ORDER EQUATION IN THE ASYMPTOTIC THEORY OF NONLINEAR OSCILLATIONS. Computer Science and Applied Mathematics, (1), 89-97. Retrieved from http://journalsofznu.zp.ua/index.php/comp-science/article/view/196