%0 Journal Article
%A Barbara Alfawicka
%T Inverse problems connected with periods of oscillations described by ẍ + g(x) = 0
%J Annales Polonici Mathematici
%D 1984
%P 297-308
%V 44
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-44-3-297-308/
%R 10.4064/ap-44-3-297-308
%G en
%F 10_4064_ap_44_3_297_308