| 1 | Hipel, K. W. and McLeod, A. I., 1996. Time series modeling of water resources and environmental systems. Elsevier Science B. V. Amsterdam, The Netherlands, 1013 pp. |
| 2 | Sneyers R. 1990. On the Statistical Analysis of Series of Observations, Technical Note No. 143 . World Meteorological Organization (WMO): Geneva; 192 |