Ligong Wang, Weige Xi. Sharp upper bounds on the signless Laplacian spectral radius of strongly connected digraphs. Discussiones Mathematicae Graph Theory, 36(4):977-988, 2016. [doi]
@article{WangX16-16, title = {Sharp upper bounds on the signless Laplacian spectral radius of strongly connected digraphs}, author = {Ligong Wang and Weige Xi}, year = {2016}, doi = {10.7151/dmgt.1915}, url = {http://dx.doi.org/10.7151/dmgt.1915}, researchr = {https://researchr.org/publication/WangX16-16}, cites = {0}, citedby = {0}, journal = {Discussiones Mathematicae Graph Theory}, volume = {36}, number = {4}, pages = {977-988}, }