Graphical schemes designed to display and study the long-term variations of schumann resonance

1. Rodríguez-Camacho, J.
2. Lopera, J.F.G.
3. Salinas, A.
4. Fornieles-Callejón, J.
5. Portí, J.
6. Blanco-Navarro, D.
7. Carmen Carrión, M.
8. Camba, E.N.