Reply to "Comment(s) on `Preacceleration without radiation: The   non-existence of preradiation phenomenon," by J. D. Jackson [Am. J. Phys. 75,   844-845 (2007)] and V. Hnizdo [Am. J. Phys. 75, 845-846 (2007)
  This paper replies the comments by J. D. Jackson [Am. J. Phys. 75, 844-845 (2007)] and V. Hnizdo [Am. J. Phys. 75, 845-846 (2007)]. 
Jose A. Heras