  We prove the results in [1] using Theorem 1 of the recent paper [2] by
Crovisier and Yang.
  References:
  [1] Arbieto, A., Rojas, C., Santiago, B., Existence of attractors, homoclinic
tangencies and singular-hyperbolicity for flows, arXiv:1308.1734v1 [math.DS] 8
Aug 2013.
  [2] Crovisier, S., Yang, D., On the density of singular hyperbolic
three-dimensional vector fields: a conjecture of Palis, arXiv:1404.5130v1
[math.DS] 21 Apr 2014.
