@article{DMGT_2023_43_2_a5,
     author = {Katona, Gyula Y. and Varga, Kitti},
     title = {Strengthening some complexity results on toughness of graphs},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {401--419},
     publisher = {mathdoc},
     volume = {43},
     number = {2},
     year = {2023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2023_43_2_a5/}
}