1. Hypercontractions and subnormality;Agler;J. Operator Theory,1985
2. Holomorphic kernels and commuting operators;Athavale;Trans. Amer. Math. Soc.,1987
3. Subnormal operators;Bram;Duke Math. J.,1955
4. Spectral properties of cyclic subnormal tuples;Curto;Amer. J. Math.,1985
5. A generalization of the Halmos-Bram criterion for subnormality;Embry;Acta Sci. Math. (Szeged),1973