1. Larson, S.M., Edberg, S.J., Levy, D.H.: see Proceeding [a] p. 209.
2. Hughes, D.W.: see Proceeding [a] p. 825.
3. Kresák, L.: see Proceeding [a] p. 607.
4. A'Hearn, M.F., in: Solar Photometry Handbook (Gennet, R., ed.). Richmond, VA: Willman-Bell (1983) p. 31.
5. Feldman, P.D., Festou, M.C., A'Hearn, M.F., Arpigny, C., Butterworth, P.S., Cosmovici, C.B., Danks, A.C., Gilmozzi, R., Jackson, W.M., McFadden, L.A., Patriarchi, P., Schleicher, D.G., Tozzi, G.P., Wallis, M.K., Waver, H.A., Woods, T.N.: Astron. Astrophys. 187 (1987) 325.