1. Goudis, C. 1982, The Orion Complex, A Case Study of Interstellar Matter, Dordrecht, Reidel Publ. Co.
2. 1982, Annals of the New York Academy of Sciences, 395, ed. Glassgold, A., Huggins, P., and Schueking, E.L.
3. I.A.U. Symposium No. 108 (1983) Reidel Publishers and Elliot, K.H., Goudis, C., Meaburn, J., and Tebbutt, N.J., 1977, Astron. Astrophys., 55, 187.
4. International Astronomical Union Symposium No. 76, 1978. Edited by Y. Terzian (Dordrecht: Reidel Publ. Co.).
5. See also: I.A.U. Symposium No. 103, 1983, Reidel Publ. Co., and references cited in these articles.