%----------------------------------------------------------------------------------
@article{Hayakawa2021a,
  year = 2021,
  title = {{The Extreme Space Weather Event in February/March 1941}},
  author = {H. Hayakawa and S. P. Blake and A. Bhaskar and K. Hattori
 i           and D. M. Oliveira and Y. Ebihara},
  journal = {The Astrophysical Journal},
  doi = {10.3847/1538-4357/abb772},
  volume = 908,
  number = 2
}