SOLUTION OF THE CAUCHY PROBLEM FOR THE MULTIDIMENSIONAL GENERALIZED EULER–POISSON–DARBOUX EQUATION BY THE METHOD OF SPHERICAL MEANS. ijai [Internet]. 2024 Jun. 30 [cited 2025 Sep. 25];4(04):284-92. Available from: https://www.academicpublishers.org/journals/index.php/ijai/article/view/944