  Some experimental results of correlation functions in Bose-Einstein
interferometry measurements exhibit a non smooth behaviour - oscillations.
Possible origin of such a behaviour in non-trivial spatial distribution of the
source is considered. 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.
