%0 Journal Article %A A. Pliƛ %T Uniqueness of optimal trajectories for non-linear control systems %J Annales Polonici Mathematici %D 1974 %P 397-401 %V 29 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-29-4-397-401/ %R 10.4064/ap-29-4-397-401 %G en %F 10_4064_ap_29_4_397_401