@article{RM_1985_40_6_a9,
     author = {T. Gramchev},
     title = {Classical pseudodifferential operators and {Egorov's} theorem in the {Gevrey} classes $G^s$, $s>1$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {125--126},
     publisher = {mathdoc},
     volume = {40},
     number = {6},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1985_40_6_a9/}
}