@article{702403,
     title = {On a class of weighted Sobolev spaces},
     booktitle = {Nonlinear Analysis, Function Spaces and Applications},
     series = {GDML\_Books},
     publisher = {BSB B. G. Teubner Verlagsgesellschaft},
     address = {Leipzig},
     year = {1979},
     pages = {4-22},
     mrnumber = {MR0578907},
     zbl = {0402.46025},
     url = {http://dml.mathdoc.fr/item/702403}
}

Camus, Jacques. On a class of weighted Sobolev spaces, dans Nonlinear Analysis, Function Spaces and Applications, GDML_Books,  (1979), pp. 4-22. http://gdmltest.u-ga.fr/item/702403/