@ARTICLE {9428,
author={L. Gouveia and P. M. Moura and M. Ruthmair and A. F. Sousa},
doi={10.1016/j.ejor.2014.05.034},
journal={European Journal of Operational Research},
title={Spanning trees with variable degree bounds},
year={2014},
month={December},
volume={239},
number={3},
pages={830-841},
ISSN={0377-2217}
}