%0 Journal Article %A M. H. Shirdarreh Haghighi %T Invertibility preserving linear mappings into $M_2({\mathbb C})$ %J Studia Mathematica %D 2008 %P 41-45 %V 186 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm186-1-5/ %R 10.4064/sm186-1-5 %G en %F 10_4064_sm186_1_5