@article{DMGT_2004_24_2_a7,
     author = {Kawarabayashi, Ken-ichi},
     title = {Vertex-disjoint copies of {K{\textasciimacron}₄}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {249--262},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2004_24_2_a7/}
}