The Maunder minimum (1645-1715) was indeed a grand minimum: A reassessment of multiple datasetsDOI: info:10.1051/0004-6361/201526652v. 581EDP SciencesA95
Usoskin, Ilya G., Arlt, Rainer, Asvestari, Eleanna, Hawkins, Ed, Käpylä, Maarit, Kovaltsov, Gennady A., Krivova, Natalie, Lockwood, Michael, Mursula, Kalevi, O'Reilly, Jezebel, Owens, Matthew, Scott, Chris J., Sokoloff, Dmitry D., Solanki, Sami K., Soon, Willie, and Vaquero, José M. 2015. "The Maunder minimum (1645-1715) was indeed a grand minimum: A reassessment of multiple datasets." Astronomy and Astrophysics, 581 A95. https://doi.org/10.1051/0004-6361/201526652.