1. Allen, C. W.: 1955,Astrophysical Quantities, University of London, The Athlone Press.
2. Allen, Harold L.: 1968, Surveyor Project Final Report - Part II: Science Results, JPL Tech. Report 32-1265, pp. 459?465.
3. Allen, L. H. and Salomon, P. M.: 1970,J. Soc. Motion Picture Tel. Eng. 79, 615?620.
4. Bohlin, J. D.: 1971,Solar Phys. 18, 450?457.
5. Braslau, D.: 1970,J. Geophys. Res. 75, 3987?3999.