@incollection{JEDP_1995____A16_0,
     author = {Elias M. Stein},
     title = {Spectral multipliers and multiple-parameter structures on the {Heisenberg} group},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     eid = {16},
     pages = {1--15},
     publisher = {\'Ecole polytechnique},
     year = {1995},
     doi = {10.5802/jedp.488},
     mrnumber = {96k:22018},
     zbl = {0876.43005},
     language = {en},
     url = {https://proceedings.centre-mersenne.org/articles/10.5802/jedp.488/}
}