SIMBAD references

We present an abundance analysis of light elements in the most massive chemically peculiar (CP) stars, He-rich stars. The analysis is based on both low and high-resolution observations collected at ESO, La Silla, Chile in the optical region and includes 6 standard and 21 He-rich stars. Light element abundances display a diverse pattern from under-solar up to above-solar values. Carbon is found underabundant in the hottest He-rich stars and normal in the coolest ones, according to the LTE model predictions. The distribution of projected rotational velocities shows a significant excess of slow rotators, no He-rich stars having vsini>130km/s.