@article{DMGT_2002_22_1_a0,
     author = {Harant, Jochen and Voigt, Margit and Schiermeyer, Ingo},
     title = {Preface},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {5--6},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2002_22_1_a0/}
}