@article{DMGT_2001_21_1_a2,
     author = {Chartrand, Gary and Zhang, Ping},
     title = {On graphs with a unique minimum hull set},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {31--42},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2001_21_1_a2/}
}