%0 Journal Article %A S. Yu. Podzorov %T Initial Segments in Rogers Semilattices of $\Sigma^0_n$-Computable Numberings %J Algebra i logika %D 2003 %P 211-226 %V 42 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/AL_2003_42_2_a4/ %G ru %F AL_2003_42_2_a4