Maria Axenovich, Andrew Beveridge, Joan P. Hutchinson, Douglas B. West. Visibility Number of Directed Graphs. SIAM J. Discrete Math., 27(3):1429-1449, 2013. [doi]
@article{AxenovichBHW13,
title = {Visibility Number of Directed Graphs},
author = {Maria Axenovich and Andrew Beveridge and Joan P. Hutchinson and Douglas B. West},
year = {2013},
doi = {10.1137/120864234},
url = {http://dx.doi.org/10.1137/120864234},
researchr = {https://researchr.org/publication/AxenovichBHW13},
cites = {0},
citedby = {0},
journal = {SIAM J. Discrete Math.},
volume = {27},
number = {3},
pages = {1429-1449},
}