@article{DMGT_1999_19_1_a3,
     author = {Chartrand, Gary and Zhang, Ping},
     title = {The forcing geodetic number of a graph},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {45--58},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_1999_19_1_a3/}
}