The structure of graphs not admitting a fixed immersion by Wollan

@article{treecutwidth2015,
author = {Paul Wollan},
doi = {10.1016/j.jctb.2014.07.003},
issn = {0095-8956},
journaltitle = {Journal of Combinatorial Theory, Series B},
pages = {47--66},
title = {The structure of graphs not admitting a fixed immersion},
volume = {110},
year = {2015},
}