@article{DMGT_2009_29_2_a12,
     author = {Hud\'ak, D\'avid and Madaras, Tom\'as},
     title = {On local structure of 1-planar graphs of minimum degree 5 and girth 4},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {385--400},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2009_29_2_a12/}
}