@article{DMGT_1997_17_1_a2,
     author = {Semani\v{s}in, Gabriel},
     title = {On some variations of extremal graph problems},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {67--76},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_1997_17_1_a2/}
}