@article{7b489624c34d472fac03e323ec164176,
title = "The optimal convergence of finite element methods for the three-dimensional second-order elliptic boundary value problem with singularity",
keywords = "Graded mesh, Sobolev space, Elliptic boundary value problem",
author = "Wen-ming He and Ren Zhao and Guanrong Li and Jin Xiao and Wulan Li",
year = "2020",
month = nov,
day = "15",
doi = "10.1016/j.jmaa.2020.124369",
language = "English",
volume = "491",
journal = "Journal of Mathematical Analysis and Applications",
issn = "0022-247X",
number = "2",
}