@article{10_4153_CMB_1977_035_5,
     author = {Pao, C. V.},
     title = {Boundary-Value {Problems} of a {Degenerate} {Sobolev-Type} {Differential} {Equation}},
     journal = {Canadian mathematical bulletin},
     pages = {221--228},
     year = {1977},
     volume = {20},
     number = {2},
     doi = {10.4153/CMB-1977-035-5},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-035-5/}
}