@article{DMGT_2019_39_1_a13,
     author = {Lewis, Thomas M.},
     title = {On the {Hamiltonian} {Number} of a {Plane} {Graph}},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {171--181},
     publisher = {mathdoc},
     volume = {39},
     number = {1},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2019_39_1_a13/}
}