= Rave Methods =
 * Kalman Filter. R. Fruehwirth, R. Kubinec, W. Mitaroff and M. Regler, Comp. Phys. Comm. 96, 189 (1996)
 * Adaptive Vertex Fitter: http://cmsdoc.cern.ch/doc/notes/docs/NOTE2007_008
 * MVF FIXME citation: CMS CR-2004/062, http://cmsdoc.cern.ch/documents/04/cr04_062.pdf
 * Zvres FIXME citation
 * Trimmed Kalman  FIXME citation

 * Comparison of algorithms in CMS: http://cmsdoc.cern.ch/doc/notes/docs/NOTE2006_032
 * WW's thesis: CMS TS-2006/012 W. Waltenberger, Development of Vertex Finding and Vertex Fitting Algorithms for CMS http://wwwhephy.oeaw.ac.at/u3w/w/walten/www/diss_v2.pdf