%0 Journal Article %A Zbigniew Karno %T On a theorem of P. S. Aleksandrov %J Colloquium Mathematicum %D 1997 %P 39-51 %V 72 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-72-1-39-51/ %R 10.4064/cm-72-1-39-51 %G en %F 10_4064_cm_72_1_39_51