%0 Journal Article %A J. A. Czekajewski %A W. A. Woyczyński %T A real-time method for fast determination of the fundamental frequency %J Applicationes Mathematicae %D 1966 %P 253-259 %V 9 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-9-3-253-259/ %R 10.4064/am-9-3-253-259 %G en %F 10_4064_am_9_3_253_259