Andrzej Zak. A note on k-placeable graphs. Discrete Mathematics, 311(22):2634-2636, 2011. [doi]
@article{Zak11, title = {A note on k-placeable graphs}, author = {Andrzej Zak}, year = {2011}, doi = {10.1016/j.disc.2011.08.002}, url = {http://dx.doi.org/10.1016/j.disc.2011.08.002}, researchr = {https://researchr.org/publication/Zak11}, cites = {0}, citedby = {0}, journal = {Discrete Mathematics}, volume = {311}, number = {22}, pages = {2634-2636}, }