@article{DMGT_1997_17_1_a9,
     author = {Harminc, Mat\'u\v{s}},
     title = {On a characterization of graphs by average labellings},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {133--136},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_1997_17_1_a9/}
}