%0 Journal Article %A D. L. Burkholder %A R. F. Gundy %T Extrapolation and interpolation of quasi-linear operators on martingales %J Matematika %D 1971 %P 91-141 %V 15 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MAT_1971_15_3_a4/ %G ru %F MAT_1971_15_3_a4