Equator-Pole Differences in the Solar Chromosphere from Lyman-Continuum DataDOI: info:10.1007/BF00165274v. 26335–342
Vernazza, J. E. and Noyes, R. W. 1972. "Equator-Pole Differences in the Solar Chromosphere from Lyman-Continuum Data." Solar Physics, 26 335–342. https://doi.org/10.1007/BF00165274.