@article{RSMUP_1983__69__221_0,
     author = {Nacinovich, Mauro},
     title = {On weighted estimated for some systems of partial differential operators},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {221--232},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {69},
     year = {1983},
     mrnumber = {716996},
     zbl = {0531.35018},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1983__69__221_0/}
}