The quasi-biennial oscillation of 1.7 years in ground level enhancement eventsDOI: info:10.1016/j.newast.2017.09.007v. 607–13
Velasco Herrera, V. M., Pérez-Peraza, Jorge, Soon, Willie, and Márquez-Adame, J. C. 2018. "The quasi-biennial oscillation of 1.7 years in ground level enhancement events." New Astronomy, 60 7–13. https://doi.org/10.1016/j.newast.2017.09.007.