Jun Fujisawa, Adriana Hansberg, Takahiro Kubo, Akira Saito, Masahide Sugita, Lutz Volkmann. A note on the 2-domination number of a tree. Australasian J. Combinatorics, 40:265-268, 2008. [doi]
@article{FujisawaHKSSV08,
title = {A note on the 2-domination number of a tree},
author = {Jun Fujisawa and Adriana Hansberg and Takahiro Kubo and Akira Saito and Masahide Sugita and Lutz Volkmann},
year = {2008},
url = {http://ajc.maths.uq.edu.au/pdf/40/ajc_v40_p265.pdf},
researchr = {https://researchr.org/publication/FujisawaHKSSV08},
cites = {0},
citedby = {0},
journal = {Australasian J. Combinatorics},
volume = {40},
pages = {265-268},
}