@InProceedings{SLZ08,
author = {Schindelar, K. and Levandovskyy, V. and Zerz, E."},
title = {Linear exact modeling with variable coefficients},
booktitle = {Proceedings of the International Symposium on Mathematical Theory of Networks and Systems (MTNS'08), Blacksburg, USA},
publisher = {SIAM},
year = {2008}
}