@article{Protopopov:2019VH,
  author = "Protopopov, Grigory  and  Anashin, Vasily  and  Bondarev, Evgeny  and  Balykina, Nataly  and  Denisova, Valentina I  and  Tsurgaev, Alexey V  and  Repin, Andrey",
  title = "{Features of 2017-2018 Solar Proton Events Determined by On-board Measurements at Russian Spacecraft in Geostationary and Polar Orbits}",
  doi = "10.22323/1.358.1141",
  journal = "PoS",
  year = 2019,
  volume = "ICRC2019",
  pages = "1141"
}