%0 Journal Article %A Mary L. Cartwright %A H. P. F. Swinnerton-Dyer %T Boundedness theorems for some second order differential equations I %J Annales Polonici Mathematici %D 1974 %P 233-258 %V 29 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-29-3-233-258/ %R 10.4064/ap-29-3-233-258 %G en %F 10_4064_ap_29_3_233_258