Circular correlation based identification of switching power converter with uncertainty analysis using fuzzy density approach. - Tomi Roinila; Tomi Helin; Matti Vilkko; Teuvo Suntio; Hannu Koivisto (Simul. Model. Pract. Theory, 2009)

The GARCH-FuzzyDensity method for density forecasting. - Tomi Helin; Hannu Koivisto (Appl. Soft Comput., 2011)