Dumitru N. Vulcanov Valentina D. Vulcanov The Use of Maple Platform for the Study of Geodesic Motion on Curved Spacetimes. 55-62 2006 conf/synasc/2006 SYNASC http://doi.ieeecomputersociety.org/10.1109/SYNASC.2006.76 db/conf/synasc/synasc2006.html#VulcanovV06