Lutz Volkmann. k-alliances in graphs. Discussiones Mathematicae Graph Theory, 31(4):699-707, 2011. [doi]
@article{Volkmann11a, title = {k-alliances in graphs}, author = {Lutz Volkmann}, year = {2011}, doi = {10.7151/dmgt.1574}, url = {http://dx.doi.org/10.7151/dmgt.1574}, researchr = {https://researchr.org/publication/Volkmann11a}, cites = {0}, citedby = {0}, journal = {Discussiones Mathematicae Graph Theory}, volume = {31}, number = {4}, pages = {699-707}, }