Claudio Delrieux Gustavo Ramoscelli Mirta Padin Rendering Phase Portraits and Bifurcation Diagrams in Multidimensional Oscillating Systems. 58-67 2001 conf/sccc/2001 SCCC http://csdl.computer.org/comp/proceedings/sccc/2001/1396/00/13960058abs.htm db/conf/sccc/sccc2001.html#DelrieuxRP01