@article{MAN_1985__273_164072,
     author = {Malcolm Adams and Tudor. Ratiu and Rudolf Schmid},
     title = {A {Lie} {Group} {Structure} for {Pseudodifferential} {Operators.}},
     journal = {Mathematische Annalen},
     pages = {529--552},
     publisher = {mathdoc},
     volume = {273},
     year = {1985},
     zbl = {0587.58047},
     url = {http://geodesic.mathdoc.fr/item/MAN_1985__273_164072/}
}