1. Abramov, Yu.Yu., Dykhne, A.M., Napartovich, A.P.: Transfer of resonance radiation in a half-space. Astrophysics 3, 215-223 (1967)
2. translation from Astrofizika 3, 459-479 (1967)
3. Faurobert, M., Frisch, H.: Line transfer with complete frequency redistribution in an absorbing medium. Scaling laws and approximations. Astron. Astrophys. 149, 372–382 (1985)
4. Hummer, D.G.: Non-coherent scattering-III. The effect of continuous absorption on the formation of spectral lines. Mon. Not. R. Astr. Soc. 133, 73–108 (1968)
5. Ivanov, V.V.: Transfer of Radiation in Spectral Lines, Washington Government Printing Office, NBS Spec. Publ., vol. 385 (1973), translation by D.G. Hummer and E. Weppner