@article{AM2_1985__28_137068,
     author = {L. Losonczi},
     title = {An extension theorem.},
     journal = {Aequationes mathematicae},
     pages = {293--299},
     publisher = {mathdoc},
     volume = {28},
     year = {1985},
     zbl = {0572.39004},
     url = {http://geodesic.mathdoc.fr/item/AM2_1985__28_137068/}
}