@article{AIF_1990__40_3_657_0,
     author = {Lerner, Nicolas and Nourrigat, Jean},
     title = {Lower bounds for pseudo-differential operators},
     journal = {Annales de l'Institut Fourier},
     pages = {657--682},
     year = {1990},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {40},
     number = {3},
     doi = {10.5802/aif.1227},
     mrnumber = {92a:35172},
     zbl = {0703.35182},
     language = {en},
     url = {https://www.numdam.org/articles/10.5802/aif.1227/}
}