BARRICELLI, N. A., and R. METCALFE. “A Noie on the Loss of Hydrogen and the Supply of Hydrogen to the Earth As a Direct or Indirect Effect of the Solar Wind”. Annals of Geophysics 22, no. 2 (November 25, 1969): 105–109. Accessed April 28, 2024. https://www.annalsofgeophysics.eu/index.php/annals/article/view/5083.