1. Adelman, S.J. 1973, Astrophys. J. 183, 95.
2. Adelman, S.J. and Cowley, C.R. 1986, in Upper Main Sequence Stars with Anomalous Abundances, eds.C.R. Cowley, M.M. Dworetsky and C. Mégessier D. Reidel Publ. Company, Dordrecht, p.305.
3. Alecian, G. 1986, in Upper Main Sequence Stars with Anomalous Abundances, eds.C.R. Cowley, M.M. Dworetsky and C. Mégessier, D. Reidel Publ. Company, Dordrecht, p.381.
4. Alecian, G. and Artru, M.-C. 1987, Astron. Astrophys. 186, 223.
5. Alecian, G. and Grappin, R. 1984, Astron. Astrophys. 140, 159.