Nicole Eggemann, Steven D. Noble. The complexity of two graph orientation problems. Discrete Applied Mathematics, 160(4-5):513-517, 2012. [doi]
@article{EggemannN12,
title = {The complexity of two graph orientation problems},
author = {Nicole Eggemann and Steven D. Noble},
year = {2012},
doi = {10.1016/j.dam.2011.10.036},
url = {http://dx.doi.org/10.1016/j.dam.2011.10.036},
researchr = {https://researchr.org/publication/EggemannN12},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {160},
number = {4-5},
pages = {513-517},
}