Rahmanifard, F ; Jordan, A. P ; Wet, W. C... https://centaur.reading.ac.uk/102467/8/Space%20Weather%20-%202021%20-%20Rahmanifard%20-%20Evidence%20From%20Galactic%20Cosmic%20Rays%20That%20the%20Sun%20Has%20Likely%20Entered%20a%20Secular%20Minimum.pdf.
,
2022