@article{DMGT_2012_32_2_a5,
     author = {Chellali, Mustapha and Meddah, Nac\'era},
     title = {Trees with equal 2-domination and 2-independence numbers},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {263--270},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {2012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2012_32_2_a5/}
}