@article{GDZPPN002328801, title = {A Lie Group Structure for Fourier Integral Operators.}, journal = {Mathematische Annalen}, volume = {275}, year = {1986}, pages = {19-42}, zbl = {0619.58010}, url = {http://dml.mathdoc.fr/item/GDZPPN002328801} }
Adams, Malcolm; Schmid, Rudolf; Ratiu, Tudor. A Lie Group Structure for Fourier Integral Operators.. Mathematische Annalen, Tome 275 (1986) pp. 19-42. http://gdmltest.u-ga.fr/item/GDZPPN002328801/