22-year cycle in the frequency of aurora occurrence in XIX century: Latitudinal effects.

MLA

Ptitsyna, N., et al. “22-Year Cycle in the Frequency of Aurora Occurrence in XIX Century: Latitudinal Effects.” Geomagnetism & Aeronomy, vol. 57, no. 2, Mar. 2017, pp. 190–98. EBSCOhost, https://doi.org/10.1134/S0016793217020116.

APA

Ptitsyna, N., Tyasto, M., & Khrapov, B. (2017). 22-year cycle in the frequency of aurora occurrence in XIX century: Latitudinal effects. Geomagnetism & Aeronomy, 57(2), 190–198. https://doi.org/10.1134/S0016793217020116

Chicago

Ptitsyna, N., M. Tyasto, and B. Khrapov. 2017. “22-Year Cycle in the Frequency of Aurora Occurrence in XIX Century: Latitudinal Effects.” Geomagnetism & Aeronomy 57 (2): 190–98. doi:10.1134/S0016793217020116.