Zr. Liu et Sq. Zhang, NONSIMULTANEOUS COLLISION PERIODIC-SOLUTIONS FOR N-BODY PROBLEMS, Journal of mathematical analysis and applications, 212(2), 1997, pp. 343-348
In this paper we prove the existence of a non-simultaneous collision T
-periodic solution (for any given T) far a class of N-body type proble
ms. (C) 1997 Academic Press.