@article {IOPORT.03710213,
    author       = {Griggs, Jerrold R.},
    title        = {Extremal values of the interval number of a graph, II.},
    year         = {1979},
    journal      = {Discrete Mathematics},
    volume       = {28},
    issn         = {0012-365X},
    pages        = {37-47},
    publisher    = {Elsevier Science B.V. (North-Holland), Amsterdam},
    doi          = {10.1016/0012-365X(79)90183-3},
    identifier   = {03710213},
}