TY  - RPRT
TI  - A comparison between progressive extension method (PEM) and iterative method (IM) for magnetic field extrapolations in the solar atmosphere
AU  - Wu, S. T.
AU  - Sun, M. T.
AU  - Sakurai, Takashi
PY  - 1990
UR  - https://ntrs.nasa.gov/citations/19910039590
ID  - 19910039590
ER  -