Some experimental results of correlation functions in Bose-Einstein (B-E) interferometry measurements exhibit a non smooth behaviour - oscillations. Possible origin of such a behaviour in non-trivial spatial distribution of the source is considered here. A method for obtaining additional information about the structure of source emitting identical particles is suggested. It is shown that this information could be extracted by a one dimensional fourier analysis of the filtered correlation function. Further possible enhancement of the method is sketched. Some technical aspects of the proposed technique are discussed. (author). 13 refs, 4 figs.