N. Wex et G. Schafer, INNERMOST STABLE ORBITS FOR COALESCING BINARY-SYSTEMS OF COMPACT OBJECTS - A REMARK, Classical and quantum gravity, 10(12), 1993, pp. 2729-2731
We show that the method introduced by Kidder, Will and Wiseman to find
a reliable approximation to the innermost stable circular orbit of a
binary system does not lead to convincing results.