@article{alberti:hal-01292609, TITLE = {{Un r{\'e}sultat de perturbations singulieres avec la norm H}}, AUTHOR = {Alberti, Giovanni and Bouchitt{\'e}, Guy and Seppecher, Pierre}, URL = {https://univ-tln.hal.science/hal-01292609}, JOURNAL = {{CR Acad. Sci. Paris, Ser. I}}, VOLUME = {319}, PAGES = {333--338}, YEAR = {1994}, HAL_ID = {hal-01292609}, HAL_VERSION = {v1}, }