Wen-Lian Hsu. The distance-domination numbers of trees. Oper. Res. Lett., 1(3):96-100, 1982. [doi]
@article{Hsu82-2, title = {The distance-domination numbers of trees}, author = {Wen-Lian Hsu}, year = {1982}, doi = {10.1016/0167-6377(82)90005-0}, url = {https://doi.org/10.1016/0167-6377(82)90005-0}, researchr = {https://researchr.org/publication/Hsu82-2}, cites = {0}, citedby = {0}, journal = {Oper. Res. Lett.}, volume = {1}, number = {3}, pages = {96-100}, }