@article{RSMUP_1966__36_2_285_0,
     author = {Cattabriga, Lamberto},
     title = {Su una classe di polinomi ipoellittici},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {285--309},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {36},
     number = {2},
     year = {1966},
     mrnumber = {206500},
     zbl = {0144.06601},
     language = {it},
     url = {http://www.numdam.org/item/RSMUP_1966__36_2_285_0/}
}