@article{AIF_1973__23_4_271_0,
     author = {Lumer, Gunter},
     title = {Perturbation de g\'en\'erateurs infinit\'esimaux du type {\guillemotleft}changement de temps{\guillemotright}},
     journal = {Annales de l'Institut Fourier},
     pages = {271--279},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {23},
     number = {4},
     year = {1973},
     doi = {10.5802/aif.492},
     mrnumber = {49 #3596},
     zbl = {0263.47035},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.5802/aif.492/}
}