%0 Journal Article %A BOURHIM, A. %A MILLER, V. G. %T THE SINGLE-VALUED EXTENSION PROPERTY IS NOT PRESERVED UNDER SUMS AND PRODUCTS OF COMMUTING OPERATORS %J Glasgow mathematical journal %D 2007 %P 99-104 %V 49 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S001708950700345X/ %R 10.1017/S001708950700345X %F 10_1017_S001708950700345X