1. Diffuse reflection of light by a foggy medium;Ambarzumian, V. A.;C. R. (Doklady) Acad. Sci. URSS (N.S.),1943
2. V. A. Ambarzumian, Russian Astronomical Journal vol. 19 (1942).
3. V. A. Ambarzumian, Journal of Physics of the Academy of Sciences of the U.S.S.R. vol. 8 (1944) p. 65.
4. S. Chandrasekhar, Astrophysical Journal vol. 99 (1944) p. 180; vol. 100 (1944) pp. 76, 117, 355; vol. 101 (1945) pp. 95, 328, 348; vol. 102 (1945) p. 402; vol. 103 (1946) pp. 165, 351; vol. 104 (1946) pp. 110, 191; vol. 105 (1947) pp. 151, 164, 424, 435, 441, 461. (Further papers in this series are in course of publication in the same journal.)
5. The formation of absorption lines in a moving atmosphere;Chandrasekhar, S.;Rev. Modern Phys.,1945