Geoffroy Simon Amaury Lendasse Marie Cottrell Jean-Claude Fort Michel Verleysen Time series forecasting: Obtaining long term trends with self-organizing maps. 1795-1808 2005 26 Pattern Recognition Letters 12 http://dx.doi.org/10.1016/j.patrec.2005.03.002 db/journals/prl/prl26.html#SimonLCFV05