Symbolic Methods for the Equivalence Problem for Systems of Implicit Ordinary Differential Equations.

Kurt Schlacher Andreas Kugi Kurt Zehetleitner Symbolic Methods for the Equivalence Problem for Systems of Implicit Ordinary Differential Equations. 140-151 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2630&spage=140 2001 conf/snsc/2001 SNSC db/conf/snsc/snsc2001.html#SchlacherKZ01