Useful references and some sources of the statistics used:

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Akaike, H. (1974) ‘A new look at the statistical model identification’, IEEE Transactions on Automotive Control, AC-19, pp 716 – 723.

Appolov, B., Kalinin G., Komarov, V.  (1974): Hydrological forecasting course, Guidrometeoizdat, Leningrad, 419 p. (In Russian)

Armstrong, J.S. and Collopy, F. (1992) ‘Error measures for generalizing about forecasting methods: Empirical comparisons’, Journal of Forecasting, Vol 8, pp 69 – 80.

Astatkie, T. (2006) 'Absolute and relative measures for evaluating the forecasting performance of time series models for daily streamflows', Nordic Hydrology, Vol 37(3), pp 205 - 215.

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Criss, R.E. and Winston, W.E. (2008) 'Do Nash values have value? Discussion and alternate proposals', Hydorlogical Processes, Vol 22, pp 2723 - 2725.

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Dawson, C.W. Abrahart, R.J. and See, L.M. (2007) 'HydroTest: a web-based toolbox of evaluation metrics for the standardised assessment of hydrological forecasts', Environmental Modelling and Software, Vol 22, pp 1034 - 1052.

deVos, N.J. and Rientjes, T.H.M. (2005) ‘Constraints of artificial neural networks for rainfall-runoff modelling: trade-offs in hydrological state representation and model evaluation’, Hydrology and Earth System Sciences, Vol 9, pp 111 – 126.

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Huang, W.C. and Yang, F.T. (2005) ‘A study on regionalized hydrologic model’, <>, (accessed 29 September, 2005)

Jain, A. and Srinivasulu, S. (2004) 'Development of effective and efficient rainfall-runoff models using integration of deterministic, real-coded genetic algorithms and artificial neural network techniques', Water Resources Research, Vol 40, W04302.

Kanji, G.K. (1993) '100 Statistical Tests', Sage Publications, London.

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Nash, J.E. and Sutcliffe, J.V. (1970) ‘River flow forecasting through conceptual models 1: A discussion of principles’, Journal of Hydrology, Vol 10, pp 282 – 290.

Popov E.G. (1968): Fundaments of hydrological  forecasting, Guidrometeorologuicheskoie izdatielztvo, Leningrad, 294 p. (in Russian)

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Watts, G. (1997) ‘Hydrological modelling in practice’, in Contemporary Hydrology: Towards holistic environmental science, Wilby, R.L. (ed), John Wiley, UK.

Wilmott, C.J. (1981) ‘On the validation of models’, Physical Geography, Vol 2, pp 184 – 194.

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