1. The Distribution Function of Cosmic Rays at the Initial Stage of a Solar Proton Event

   • Yu. I. Fedorov

   SPACE PHYSICS 30 June 2020 Pages: 103 - 113

   

2. Development of Firehose Instability of a Magnetosonic Type in the Presence of High-Speed Proton Beams

   • P. P. Malovichko
   • Yu. V. Kyzyurov

   SPACE PHYSICS 30 June 2020 Pages: 114 - 128

3. Extremely High Energy (E > 10²⁰ eV) Cosmic Rays: Potential Sources

   • R. Hnatyk
   • V. Voitsekhovskyi

   EXTRAGALACTIC ASTRONOMY 30 June 2020 Pages: 129 - 139

   

4. Morphology of the Flare-Productive Active Region NOAA 9087

   • S. N. Chornogor
   • N. N. Kondrashova

   SOLAR PHYSICS 30 June 2020 Pages: 140 - 152