@article{IM_1977__43_142507,
     author = {S.M. Webster},
     title = {On the {Mapping} {Problem} for {Algebraic} {Real} {Hypersurfaces.}},
     journal = {Inventiones mathematicae},
     pages = {53--68},
     year = {1977},
     volume = {43},
     zbl = {0348.32005},
     url = {http://geodesic.mathdoc.fr/item/IM_1977__43_142507/}
}