19 citations as recorded by crossref.

1. Unaided-eye Sunspot Observations in 1769 November: A Comparison of Graphical Records in the East and the West H. Hayakawa et al. 10.1007/s11207-019-1488-5
2. Historical sunspot observations: A review J. Vaquero 10.1016/j.asr.2007.01.087
3. Sunspot numbers based on historic records in the 1610s: Early telescopic observations by Simon Marius and others R. Neuhäuser & D. Neuhäuser 10.1002/asna.201512292
4. The Great Space Weather Event during 1872 February Recorded in East Asia H. Hayakawa et al. 10.3847/1538-4357/aaca40
5. Extreme Solar Flare as a Catastrophic Risk H. Isobe et al. 10.20965/jdr.2022.p0230
6. Identification of Possible Intense Historical Solar Storms During the Years 1781–1788 Inferred from Aurorae and Geomagnetic Observations in Rio De Janeiro J. Vaquero & R. Trigo 10.1007/s11207-006-0024-6
7. Evaluation of the 900‐Year European Auroral Records With Extreme Value Theory S. Chen et al. 10.1029/2021JA029481
8. The extreme space weather events in October 1788 K. Hattori et al. 10.1093/pasj/psab079
9. A Transit of Venus Possibly Misinterpreted as an Unaided-Eye Sunspot Observation in China on 9 December 1874 H. Hayakawa et al. 10.1007/s11207-019-1504-9
10. New sunspots and aurorae in the historical Chinese text corpus? Comments on uncritical digital search applications D. Neuhäuser et al. 10.1002/asna.201713390
11. On the Connection Between Solar Activity and Low-Latitude Aurorae in the Period 1715 – 1860 M. Vázquez et al. 10.1007/s11207-006-0194-2
12. Revisiting Kunitomo’s Sunspot Drawings During 1835 – 1836 in Japan M. Fujiyama et al. 10.1007/s11207-019-1429-3
13. Low-latitude Aurorae during the Extreme Space Weather Events in 1859 H. Hayakawa et al. 10.3847/1538-4357/aae47c
14. Ancient Auroral Records Compiled From Korean Historical Books Y. Wang et al. 10.1029/2020JA028763
15. Records of sunspots and aurora candidates in the Chinese official histories of the Yuán and Míng dynasties during 1261–1644 H. Hayakawa et al. 10.1093/pasj/psx045
16. A candidate auroral report in the Bamboo Annals, indicating a possible extreme space weather event in the early 10th century BCE M. van der Sluijs & H. Hayakawa 10.1016/j.asr.2022.01.010
17. Candidate Auroral Observations Indicating a Major Solar–Terrestrial Storm in 1680: Implication for Space Weather Events during the Maunder Minimum H. Hayakawa et al. 10.3847/1538-4357/abb3c2
18. Rediscovery of 23 Historical Records of Naked-Eye Sunspot Observations in AD 1618 H. Wang & H. Li 10.1007/s11207-022-02046-w
19. Long-Term Trends and Gleissberg Cycles in Aurora Borealis Records (1600 – 2015) M. Vázquez et al. 10.1007/s11207-016-0849-6