2562 20160701171707.0 ASTROimport-719 Frémat, Y. 2008 CNO abundance determination in massive fast rotating stars Be stars are early-type Main Sequence objects which have shown at least once some emission in the hydrogen line series. Their most important characteristic is fast rotation, which on average reach ˜ 90% of the critical rate, i.e. O/O_{c} %˜ 0.90. Since a number of them have masses M > 15 M_?, they are ideal targets to study the effects of rotational mixing on the atmospheric CNO abundance and to perform comparisons with the predictions obtained from recent evolutionary models with rotation. Zorec, J. Martayan, C. Lanz, T. Revista Mexicana de Astronomia y Astrofisica Conference Series 33 2008 53-53 http://esoads.eso.org/abs/2008RMxAC..33...53F published in NONREF