Gyula Y. Katona. Toughness and edge-toughness. Discrete Mathematics, 164(1-3):187-196, 1997. [doi]
@article{Katona97a, title = {Toughness and edge-toughness}, author = {Gyula Y. Katona}, year = {1997}, doi = {10.1016/S0012-365X(96)00051-9}, url = {http://dx.doi.org/10.1016/S0012-365X(96)00051-9}, researchr = {https://researchr.org/publication/Katona97a}, cites = {0}, citedby = {0}, journal = {Discrete Mathematics}, volume = {164}, number = {1-3}, pages = {187-196}, }