@article{Poluianov:2023n+,
  author = "Poluianov, Stepan  and  Batalla, Oscar  and  Mishev, Alexander  and  Koldobskiy, Sergey  and  Usoskin, Ilya",
  title = "{Two sub-GLE events detected with South Pole and Vostok neutron monitors in 1968 and 1969}",
  doi = "10.22323/1.444.1250",
  journal = "PoS",
  year = 2023,
  volume = "ICRC2023",
  pages = "1250"
}