Bugir M. Theorems on the average values and non-oscillating character of the solutions of the partial differential equations in the spaces $E^n$ and $P^n$ . Ukr. Mat. Zhurn. [Internet]. 2024Mar.26 [cited 2024Nov.24];44(11):1477-83. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/8248