Existence of periodic orbits for singular-hyperbolic Lyapunov stable sets

Bautista and Morales proved the existence of periodic orbits in singular-hyperbolic attracting sets(). In this paper, we extend their result to singular-hyperbolic Lyapunov stable sets. (()“Existence of periodic orbits for singular-hyperbolic sets”, Moscow Mathematical Journal, 6 (2006), 265-297)