@article{MZ_1987__196_173884,
     author = {G. Galusinki},
     title = {Retractions r\'eguli\`eres.},
     journal = {Mathematische Zeitschrift},
     pages = {315--322},
     publisher = {mathdoc},
     volume = {196},
     year = {1987},
     zbl = {0639.32014},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__196_173884/}
}