@article{MAN_1986__276_164180,
     author = {Malcolm Adams and Rudolf Schmid and Tudor Ratiu},
     title = {A {Lie} {Group} {Structure} for {Fourier} {Integral} {Operators.}},
     journal = {Mathematische Annalen},
     pages = {19--42},
     publisher = {mathdoc},
     volume = {276},
     year = {1986},
     zbl = {0619.58010},
     url = {http://geodesic.mathdoc.fr/item/MAN_1986__276_164180/}
}