%0 Journal Article %A S. I. Mardaev %T Least fixed points in Grzegorczyk logic and intuitionistic %J Algebra i logika %D 1993 %P 519-536 %V 32 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_1993_32_5_a2/ %G ru %F AL_1993_32_5_a2