@article{AM2_1978__17_136740,
     author = {Andrzej Grzaslewicz},
     title = {On extensions of homomorphisms.},
     journal = {Aequationes mathematicae},
     pages = {199--207},
     publisher = {mathdoc},
     volume = {17},
     year = {1978},
     zbl = {0383.20025},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__17_136740/}
}