%0 Journal Article
%A X. Z. Zhao
%A Y. Q. Guo
%A K. P. Shum
%T Sturdy frames of type $(2,2)$ algebras
 and their applications to semirings
%J Fundamenta Mathematicae
%D 2003
%P 69-81
%V 179
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm179-1-6/
%R 10.4064/fm179-1-6
%G en
%F 10_4064_fm179_1_6