K-theory of the $C^*$-algebra of multivariable Wiener-Hopf operators associated with some polyhedral cones in $R^n$. Ann. Sofia Univ. Fac. Math. and Inf. 1999;91:115-125. Accessed January 11, 2026. https://annual.uni-sofia.bg/index.php/fmi/article/view/274