%0 Journal Article %A Surajit Chattopadhyay %A Deepak Jhajharia %A Goutami Chattopadhyay %T Trend estimation and univariate forecast of the sunspot numbers: Development and comparison of ARMA, ARIMA and Autoregressive Neural Network models %J Comptes Rendus. GĂ©oscience %D 2011 %P 433-442 %V 343 %N 7 %I Elsevier %R 10.1016/j.crte.2011.07.008 %G en %F CRGEOS_2011__343_7_433_0