@article{MZ_1976__146_172303,
     author = {Jan W. Jaworowski},
     title = {Extensions of {G-maps} and {Euclidean} {G-retracts.}},
     journal = {Mathematische Zeitschrift},
     pages = {143--148},
     publisher = {mathdoc},
     volume = {146},
     year = {1976},
     zbl = {0301.57025},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__146_172303/}
}