@article {IOPORT.01220310,
    author       = {Mozhan, N.N.},
    title        = {Density and $n$-clique chromatic number.},
    year         = {1991},
    journal      = {Issledovanie Operatsij i ASU},
    volume       = {37},
    issn         = {0321-2467},
    pages        = {54-59},
    publisher    = {Izdatel'stvo pri Kievskom Gosudarstvennom Universitete Izdatel'skogo Ob''edineniya Vishcha Shkola, Kiev},
    identifier   = {01220310},
}