• P. Erdös, H. S. Shapiro and A. L. Shields, Large and small subspaces of Hilbert space, Michigan Math. J. 12 1965 169-178.

  --> K. R. Davidson, T. G. Feeman and A. L. Shields, Extreme points in quotients of operator algebras, Topics in operator theory, 67-91, Oper. Theory Adv. Appl., 32, Birkh^Êuser, Basel, 1988.

  --> K. R. Davidson> and V. I. Paulsen, Polynomially bounded operators, J. Reine Angew. Math. 487 (1997), 153-170.

  --> M. Kaneda and V. I. Paulsen, Characterizations of essential ideals as operator modules over C*-algebras, Journal of Operator Theory 49 (2) (2003), 245-262. Published!

• I. Borosh, C. K. Chui and P. Erdös, On changes of signs in infinite series, Ann. Math. 4 (1978), No. 1, 3-12.

  --> C. K. Chui, P. W. Smith, R. R. Smith and J. D. Ward, $L$-ideals and numerical range preservation, Illinois J. Math. 21 (1977), No. 2, 365-373.

  --> D. P. Blecher and R. R. Smith, The dual of the Haagerup tensor product, J. London Math. Soc. (2) 45 (1992), No. 1, 126-144.

  --> D. P. Blecher and M. Kaneda, The ideal envelope of an operator algebra, to appear in Proceedings of the American Mathematical Society.

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