Long-term prediction of solar activity - a discussion...
Tobias S, Weiss N & Beer J
Tobias, S., Weiss, N., & Beer, J. (2004). Long-term prediction of solar activity - a discussion. Astronomy and Geophysics, 45(2), 6 (2 pp.). https://doi.org/10.1046/j.1468-4004.2003.45206_1.x