@article{10_21136_CPM_1982_118147,
     author = {Howalla, K. and Dabboucy, Abdallah N. and Tout, R.},
     title = {On the maximum number of arcs in some classes of graphs},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {388--392},
     publisher = {mathdoc},
     volume = {107},
     number = {4},
     year = {1982},
     doi = {10.21136/CPM.1982.118147},
     mrnumber = {683819},
     zbl = {0509.05044},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1982.118147/}
}