1. Astrophysical Quantities;Allen,1963
2. The twilight zone of Venus;Edson;Adv. Astr. & Astrophys.,1963
3. Diffuse reflection by planetary atmospheres;Horak;Astrophys. J.,1950
4. On the Venus airglow;Kozyrev;Izv. krÿm. astrofiz. Obs.,1956
5. The Planet Venus;Moore,1956