Gruia Calinescu, Alexander Zelikovsky. The Polymatroid Steiner Problems. J. Comb. Optim., 9(3):281-294, 2005. [doi]
@article{CalinescuZ05,
title = {The Polymatroid Steiner Problems},
author = {Gruia Calinescu and Alexander Zelikovsky},
year = {2005},
doi = {10.1007/s10878-005-1412-9},
url = {http://dx.doi.org/10.1007/s10878-005-1412-9},
researchr = {https://researchr.org/publication/CalinescuZ05},
cites = {0},
citedby = {0},
journal = {J. Comb. Optim.},
volume = {9},
number = {3},
pages = {281-294},
}