@article{ITA_2013__47_3_235_0,
     author = {Krzywkowski, Marcin},
     title = {Minimal 2-dominating sets in trees},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {235--240},
     publisher = {EDP-Sciences},
     volume = {47},
     number = {3},
     year = {2013},
     doi = {10.1051/ita/2013036},
     mrnumber = {3103126},
     zbl = {1282.05179},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/ita/2013036/}
}