Erratum to "Asymptotic representations of the period for the nonlinear oscillator over(x, ̈) + (1 + over(x, ̇)2) x = 0" [Journal of Sound and Vibration 299 (2007) 403-408] (DOI:10.1016/j.jsv.2006.07.012)

1. Beléndez, A.
2. Hernández, A.
3. Beléndez, T.
4. Neipp, C.
5. Márquez, A.