1. Abarbanel, H.D.I.: 1996, Analysis of Observed Chaotic Data, Springer, New York.
2. Abarbanel, H.D.I., Frison, T.W., Tsmring, L.S.: 1998, IEEE Signal Process. 15, 49.
3. Advances in Physics of Sunspots;C.E. Alissandrakis,1997
4. Bouwer, S.D., Pap, J., Donnelly, R.F.: 1990, In: Schatten, K.H., Arking, A. (eds.) Climate Impact of Solar Variability CP-3086, NASA, Greenbelt, 125.
5. Brown, R., Bryant, P., Abarbanel, H.D.I.: 1991, Phys. Rev. A 43, 2787.