@article{01780511, title = {Douglas algebras without maximal subalgebra and without minimal superalgebra.}, journal = {Abstract and Applied Analysis}, volume = {6}, year = {2001}, pages = {1-11}, doi = {10.1155/S1085337501000458}, zbl = {1029.46071}, language = {en}, url = {http://dml.mathdoc.fr/item/01780511} }
Guillory, Carroll. Douglas algebras without maximal subalgebra and without minimal superalgebra.. Abstract and Applied Analysis, Tome 6 (2001) pp. 1-11. doi : 10.1155/S1085337501000458. http://gdmltest.u-ga.fr/item/01780511/