Observed Heights of EUV Lines Formed in the Transition Zone and CoronaDOI: info:10.1007/BF00148710v. 22450–458
Simon, George W. and Noyes, Robert W. 1972. "Observed Heights of EUV Lines Formed in the Transition Zone and Corona." Solar Physics, 22 450–458. https://doi.org/10.1007/BF00148710.