A. Grosmann, real and complex canonical transforms, Lecture Notes in Physics, 1975.

A. Figalli, M. Ligabo, and T. Paul, Semiclassical limit for mixed states with singular and rough potentials, Indiana University Mathematics Journal
DOI : 10.1512/iumj.2012.61.4670

URL : https://hal.archives-ouvertes.fr/hal-00545715

N. Lerner, Metrics on the phase space and non-selfadjoint pseudo-differential operators, 2010.
DOI : 10.1007/978-3-7643-8510-1

T. Paul, On complex quantum flows, p.2004992
URL : https://hal.archives-ouvertes.fr/hal-02004992