机译:二阶椭圆方程的积分平均技术。
Department of Mathematics, South China Normal University, Guangzhou 510631, China;
Mathematics and Scientific Computer College, Zhongshan University, Guangzhou 510275, China;
Department of Applied Mathematics, South China University of Technology, Guangzhou 510641, China;
Oscillation; asymptotic; elliptic differential equations of second order;