Changes
<ref name="WuWe">D.B. West, H. Wu, ''Packing of Steiner trees and S-connectors in graphs'', Journal of Combinatorial Theory B 102 (2012), 186–205, [http://dx.doi.org/10.1016/j.jctb.2011.06.003 DOI link], [http://www.math.uiuc.edu/~west/pubs/strees.pdf Author link].</ref>
<ref name="DMP"> M. DeVos, J. McDonald, I. Pivotto, ''Packing Steiner Trees'', [http://arxiv.org/abs/1307.7621 arXiv link], [http://dx.doi.org/10.1016/j.jctb.2016.02.002 DOI link]
</references>
