Christoph Buchheim, Laura Klein. Combinatorial optimization with one quadratic term: Spanning trees and forests. Discrete Applied Mathematics, 177:34-52, 2014. [doi]
@article{BuchheimK14,
title = {Combinatorial optimization with one quadratic term: Spanning trees and forests},
author = {Christoph Buchheim and Laura Klein},
year = {2014},
doi = {10.1016/j.dam.2014.05.031},
url = {http://dx.doi.org/10.1016/j.dam.2014.05.031},
researchr = {https://researchr.org/publication/BuchheimK14},
cites = {0},
citedby = {0},
journal = {Discrete Applied Mathematics},
volume = {177},
pages = {34-52},
}