doi.org/10.1145/2213977.2214081
Annual ACM Symposium on Theory of Computing
MIT, Cambridge, MA, USA

Goemans, M. X., Olver, N., Rothvoss, T.& Zenklusen, R. (2012). Matroids and integrality gaps for hypergraphic steiner tree relaxations. STOC '12 Proceedings of the Forty-fourth Annual ACM Symposium on Theory of Computing, 1161–1176.https://doi.org/10.1145/2213977.2214081