@article{10_1017_S0017089500007576, author = {Vasilescu, F.-H.}, title = {Homogeneous operators and essential complexes}, journal = {Glasgow mathematical journal}, pages = {73--85}, year = {1989}, volume = {31}, number = {1}, doi = {10.1017/S0017089500007576}, url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500007576/} }