@article{EP_1998_5_a13,
     author = {G\'erard Montseny},
     title = {Diffusive representation of pseudo-differential time-operators},
     journal = {ESAIM. Proceedings},
     pages = {159--175},
     publisher = {mathdoc},
     volume = {5},
     year = {1998},
     doi = {10.1051/proc:1998005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/proc:1998005/}
}