%0 Journal Article %A Guo, Wenbin %A Shum, K. %T Minimal formations of universal algebras %J Discussiones Mathematicae. General Algebra and Applications %D 2001 %P 201-205 %V 21 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGAA_2001_21_2_a4/ %G en %F DMGAA_2001_21_2_a4