1. Berger, W. H., Labeyrie, L. D. (eds.), 1987:Abrupt Climatic Change. Dordrecht: D. Reidel, 425 pp.
2. Buishand, T. A., 1981: The Analysis of Homogeneity of Long-Term Rainfall Records in The Netherlands. De Bilt: Scientific Report KNMI, WR 81-7, 42 pp.
3. Buishand, T. A., 1982: Some methods for testing the homogeneity of rainfall records.J. Hydrol. 58, 11?27.
4. Carbonnel, J.-P., Hubert, P., Chaouche, A., 1987: Sur l'�volution s�quentielle de la pluviometrie en Afrique de l' Ouest depuis le d�but du si�cle. C.R. Acad. Sci. Paris, t. 305, s�rie II, 625?628.
5. Coops, A. J., Schuurmans, C. J. E., 1986: Detection of the CO2-effect upon the climate of Western Europe.Theor. Appl. Climatol. 37, 111?125.