| Variations in Solar Activity Across the Sporer Minimum Based on Radiocarbon in Danish Oak 期刊论文 GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (15) : 8617-8623 作者: Fogtmann-Schulz, A.; Kudsk, G. K.; Trant, P. L. K.; Baittinger, C.; Karoff, C.; Olsen, J.; Knudsen, M. F.
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