Conference Paper
Röttger, J.: Solar proton events: A source for long-period gravity waves in the polar mesophere. In: Solar-Terrestrial Energy Program, The Initial Results from STEP Facilities and Theory Campaigns, Proc. STEP Symp./ 5. COSPAR Colloq., Laurel, USA 1992, pp. 473 - 476 (Eds. Baker, D. N.; Papitashvili, V. O.; Teague, M. J.). Elsevier, Amsterdam (1994)