Lutz Volkmann. The signed Roman k-domatic number of digraphs. Australasian J. Combinatorics, 64:444-457, 2016. [doi]
@article{Volkmann16-2, title = {The signed Roman k-domatic number of digraphs}, author = {Lutz Volkmann}, year = {2016}, url = {http://ajc.maths.uq.edu.au/pdf/64/ajc_v64_p444.pdf}, researchr = {https://researchr.org/publication/Volkmann16-2}, cites = {0}, citedby = {0}, journal = {Australasian J. Combinatorics}, volume = {64}, pages = {444-457}, }