@article{RSMUP_1980__63__231_0,
     author = {Zaidman, S.},
     title = {On asymptotic series of symbols and of general pseudo-differential operators},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {231--246},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {63},
     year = {1980},
     mrnumber = {605796},
     zbl = {0475.35081},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1980__63__231_0/}
}