%0 Journal Article
%A Thomason, S. K.
%T Sublattices and Initial Segments of the Degrees of Unsolvability
%J Canadian journal of mathematics
%D 1970
%P 569-581
%V 22
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-064-7/
%R 10.4153/CJM-1970-064-7
%F 10_4153_CJM_1970_064_7