@article{ASUO_2014_XXII_3_a6,
     author = {Marilena Crupi and Giancarlo Rinaldo},
     title = {Closed graphs are proper interval graphs},
     journal = {Analele Universit\u{a}\c{t}ii "Ovidius" Constan\c{t}a Seria Matematic\u{a}},
     publisher = {mathdoc},
     volume = {XXII},
     number = {3},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/ASUO_2014_XXII_3_a6/}
}