• Removing the input derivatives in the generalized bilinear state equationsMullari, Tanel; Kotta, Ülle; Kotta, Palle; Tõnso, Maris; Zinober, AlanProceedings of the Estonian Academy of Sciences2009 / 2, p. 98-107 https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=b053956e3600449843044b1022ebefc6d5d19df8