1. Brickhouse, N., Esser, R., Habbal, S.R.: 1995, Demonstrating the limitations of line ratio temperature diagnostic using Fe x and Fe xiv spectral line intensity observations. In: Harvard-Smithsonian Center for Astrophysics, International Solar Wind Eight Conference, 69.
2. Buil, C.: 2008, http://www.astrosurf.com/buil .
3. Daw, A., Habbal, S.R., Morgan, H., Druckmüller, M., Ding, A., Johnson, J., Rusin, V.: 2010, Eclipse Observations of the Fe xi 789.2 nm Line. Bull. Am. Astron. Soc. 41, 323.
4. Demianski, M., Pasachoff, J.M.: 1984, Coelostat and Heliostat: theory of alignment. Solar Phys. 93, 211 – 217.
5. Dougherty, L.M.: 1982, A note on the principle and nomenclature of Heliostats, Coelostats Siderostats. J. British Astron. Assoc. 92(4), 182 – 187.