SLA-controlled Proxy Service Through Customisable MANO Supporting Operator Policies
T. Soenen, F. Vicens, J. Bonnet, C. Parada, E. Kapassa, M. Touloupou, E. Fotopulou, A. Zafeiropoulos, A. Pol, S. Kolometsos, G. Xilouris, P. Alemany, R. Vilalta, P. Trakadas, P. Karkazis, M. Peuster, W. Tavernier, in: 2019 IFIP/IEEE Symposium on Integrated Network and Service Management (IM), 2019, pp. 707–708.

Visual Specification, Modeling, and Illustrations of Complex Systems
C. Geiger, G. Lehrenfeld, W. Müller, in: Proceedings of HICSS-32, Maui, Hawaii, 1999.