J. Rommes, P. Lenaers, and W. Schilders. Scientific Computing in Electrical Engineering SCEE 2008, page 555--562. Berlin, Heidelberg, Springer Berlin Heidelberg, (2010)
F. Dörfler, and F. Bullo. FAC Proceedings Volumes, 43 (19):
197--202(2010)2nd \IFAC\ Workshop on Distributed Estimation and Control in Networked Systems.