@article{dressler2014confluent,
author = {Dressler, Daniel and Strehler, Martin},
title = {Polynomial-time algorithms for special cases of the maximum confluent flow problem},
journal = {Discrete Applied Mathematics},
volume = {163},
pages = {142-154},
year = {2014},
doi = {10.1016/j.dam.2013.07.012},
}