@article{AM2_1975__12_136489,
     author = {Gary Chartrand and Curtiss E. Wall},
     title = {On {Regular} {Bipartite-Preserving} {Supergraphs.} {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {110--110},
     publisher = {mathdoc},
     volume = {12},
     year = {1975},
     zbl = {0314.05103},
     url = {http://geodesic.mathdoc.fr/item/AM2_1975__12_136489/}
}