TY  - RPRT
TI  - The Sobolev approximation for the line force and line source function in a spherically-symmetrical stellar wind with continuum opacity
AU  - Puls, J.
AU  - Hummer, D. G.
PY  - 1988
UR  - https://ntrs.nasa.gov/citations/19880040687
ID  - 19880040687
ER  -