(1)
Pérez-Peraza, J.; Leyva-Contreras, A.; Valdéz-Barrón, M.; Bravo-Cabrera, J. L.; Libin, I. Y.; Jaani, A. Influence of Solar Activity on the Cyclic Variations of Precipitation in the Baltic Region. Geofis Int 1999, 38, 73-81.