The internal rotation of the GW Vir star PG 0112+200 through the eyes of   asteroseismology
  We investigate the internal rotation profile of the GW Vir (PG1159-type) star PG 0122+200 by employing an asteroseismological model that closely reproduces the observed periods of this star. We adopt a forward approach and two inversion methods based on the rotational splitting of the pulsation frequencies to explore the properties of the rotation of PG 0122+200. We found evidence for differential rotation in this star. 
A. H. C\'orsico, L. G. Althaus, S. D. Kawaler, M. M. Miller Bertolami,   and E. Garc\'ia-Berro
astro-ph.SR