A note on minimal envelopes of Douglas algebras, minimal support sets, and restricted Douglas algebras. Guillory, Carroll — 2001 International Journal of Mathematics and Mathematical Sciences
Some conditions on Douglas algebras that imply the invariance of the minimal envelope map. Guillory, Carroll — 2001 International Journal of Mathematics and Mathematical Sciences
Douglas algebras without maximal subalgebra and without minimal superalgebra. Guillory, Carroll — 2001 Abstract and Applied Analysis