@article{MASLO_1993_43_1_a1,
     author = {Knor, Martin and Niepel, \v{L}udov{\'\i}t and \v{S}olt\'es, \v{L}ubom{\'\i}r},
     title = {Centers in line graphs},
     journal = {Mathematica slovaca},
     pages = {11--20},
     year = {1993},
     volume = {43},
     number = {1},
     mrnumber = {1216264},
     zbl = {0772.05091},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1993_43_1_a1/}
}