%0 Journal Article %A KARAEV, M. T. %A PEHLIVAN, S. %T SOME RESULTS FOR QUADRATIC ELEMENTS OF A BANACH ALGEBRA %J Glasgow mathematical journal %D 2004 %P 431-441 %V 46 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089504001910/ %R 10.1017/S0017089504001910 %F 10_1017_S0017089504001910