%0 Journal Article %A Božidar Vujanović %A Đorđe Đukić %T A Variational Principle For The Theory Of Laminar Boundary Layers In Incompressible Fluids %J Publications de l'Institut Mathématique %D 1971 %P 73 %V _N_S_11 %N 25 %I mathdoc %U http://geodesic.mathdoc.fr/item/PIM_1971_N_S_11_25_a10/ %F PIM_1971_N_S_11_25_a10