@incollection{MEM_2012_41_1_a10,
     author = {Bojilov, Asen and Nenov, Nedyalko},
     title = {An {Inequality} for {Generalized} {Chromatic} {Graphs}},
     booktitle = {},
     series = {Mathematics and Education in Mathematics},
     pages = {143--147},
     year = {2012},
     volume = {41},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MEM_2012_41_1_a10/}
}