1. Rational dilation on an annulus;Agler;Ann. of Math.,1985
2. Subalgebras of C∗-algebras;Arveson;Acta Math.,1969
3. Free products of C∗-algebras;Avitzour;Trans. Amer. Math. Soc.,1982
4. Positive definite functions on the free group and the noncommutative Riesz product;Bożejko;Boll. Un. Mat. Ital. A,1986
5. Positive definite kernels, length functions on groups and noncommutative von Neumann inequality;Bożejko;Studia Math.,1989