1. Fairall, A.: Large-Scale Structures in the Universe. Wiley, New York (1998)
2. Feynman, R., Leighton, R., Sands, M.: The Feynman Lectures on Physics. Addison Wesley, Boston (2005)
3. Finkelstein, A., Kosheleva, O., Kreinovich, V.: Astrogeometry: towards mathematical foundations. Int. J. Theor. Phys. 36(4), 1009–1020 (1997)
4. Finkelstein, A., Kosheleva, O., Kreinovich, V.: Astrogeometry: geometry explains shapes of celestial bodies. Geombinatorics VI(4), 125–139 (1997)
5. Green, M.B., Schwarz, J.H., Witten, E.: Superstring Theory, vols. 1, 2. Cambridge University Press, Cambridge (1988)