@article{DMGT_2011_31_2_a6,
     author = {Galeana-S\'anchez, Hortensia and Hern\'andez-Cruz, C\'esar},
     title = {k-kernels in generalizations of transitive digraphs},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {293--312},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2011_31_2_a6/}
}