Dumanyan, V. Z. (2023) “ON THE ESTIMATION OF $\{|\triangledown u|^2dx$ FOR SOLUTIONS OF SECOND ORDER ELLIPTIC EQUATIONS”, Proceedings of the YSU A: Physical and Mathematical Sciences. Yerevan, Armenia, 42(2 (216), pp. 145–147. doi: 10.46991/PYSU:A/2008.42.2.145.