@article{KJM_2011_35_3_a1,
     author = {Maryam Atapour and Seyed Mahmoud Sheikholeslami and Lutz Volkmann},
     title = {Signed total $k$-domatic numbers of digraphs},
     journal = {Kragujevac Journal of Mathematics},
     pages = {359 },
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KJM_2011_35_3_a1/}
}