1. Eichhorn, G., Accomazzi, A., Grant, C.S., Kurtz, M.J. & Murray, S.S. 2003, African Skies
8, 7.
2. Eichhorn, G. 2004, Astron. & Geophys.
45:3, 7.
3. Astrophysics and Space Science Library;M.W. Feast,2002
4. Flanagan, C.S., Frecura, F.A.M. & Woerman, B. (Eds.) 2002, Proceedings of the “Pulsar Studies in Africa”, Workshop held at the Hartebeesthoek Radio Astronomy Observatory, 34 Dec 2001, African Skies
7.
5. Astrophysics and Space Science Library;A. Heck,2000