@article{DMGT_1998_18_1_a0,
     author = {Hoa, Vu},
     title = {Long cycles and neighborhood union in 1-tough graphs with large degree sums},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {5--13},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1998},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_1998_18_1_a0/}
}