http://fwn06.housing.rug.nl/mtns2012/Full%20Paper/MTNS2012_0177_paper.pdf (Any fulltext)
Rami, M., Bokharaie, V., Mason, O., & Wirth, F. (2012). Extremal norms for positive linear inclusions. In 20th International Symposium on Mathematical Theory of Networks and Systems (MTNS 2012) (pp. 1-8).