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APA Citation
Baker, D. N., Li, X., Pulkkinen, A., Ngwira, C. M., Mays, M. L., Galvin, A. B., & Simunac, K. D. C. (n.d.). a major solar eruptive event in July 2012: Defining extreme space weather scenarios. Space weather, 11(10), 585–591. http://access.bl.uk/ark:/81055/vdc_100024776509.0x00005d