@article{10_4153_CMB_2017_037_1,
     author = {Zhang, Tao and Zhou, Chunqin},
     title = {Classification of {Solutions} for {Harmonic} {Functions} {With} {Neumann} {Boundary} {Value}},
     journal = {Canadian mathematical bulletin},
     pages = {438--448},
     year = {2018},
     volume = {61},
     number = {2},
     doi = {10.4153/CMB-2017-037-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2017-037-1/}
}