Dan Bienstock, Odile Marcotte. On a Network Design Problem That Is Intractable on Trees. Math. Oper. Res., 15(3):530-544, 1990. [doi]
@article{BienstockM90-0,
title = {On a Network Design Problem That Is Intractable on Trees},
author = {Dan Bienstock and Odile Marcotte},
year = {1990},
doi = {10.1287/moor.15.3.530},
url = {http://dx.doi.org/10.1287/moor.15.3.530},
researchr = {https://researchr.org/publication/BienstockM90-0},
cites = {0},
citedby = {0},
journal = {Math. Oper. Res.},
volume = {15},
number = {3},
pages = {530-544},
}