@article{1181072703,
author = {Ibrahim, Sobhy E.},
title = {Nonself-adjoint Differential Operators in Direct Sum Spaces},
journal = {Rocky Mountain J. Math.},
volume = {22},
number = {4},
year = {1992},
pages = { 877-915},
language = {en},
url = {http://dml.mathdoc.fr/item/1181072703}
}
Ibrahim, Sobhy E. Nonself-adjoint Differential Operators in Direct Sum Spaces. Rocky Mountain J. Math., Tome 22 (1992) no. 4, pp. 877-915. http://gdmltest.u-ga.fr/item/1181072703/