1. Booth, R.S., Delgado, G., Hagström, M., Johansson, L.E.B., Murphy, D.C., Olberg, M., Whyborn, N.D., Greve, A., Hansson, B., Linström, C-O., Rydberg, A. (1989) Astron. Astrophys., 216, 315.
2. Booth, R.S, de Graauw, Th. (1991) in IAU Symp. 148, The Magellanic Clouds, eds. R. Haynes and D.E. Milne, (Kluwer: Dordrecht), p. 415.
3. Booth, R.S., Johansson, L.E.B., (1991) ibid, p.157.
4. Bouchet, P., Lequeux, J., Maurice, E., Prévot, L., Prévot-Burnichon, M-L. (1985) Astron. Astrophys. 149, 330.
5. Cohen, R.S., Dame, T.M., Garay, G., Montani, J., Rubio, M., Thaddeus, P. (1988) Astrophys. J., 331, L95.