A remark about elliptic overdeterminated systems
Rendiconti del Seminario Matematico della Università di Padova, Tome 58 (1977), pp. 191-194. 
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     author = {Bratti, Giuliano},
     title = {A remark about elliptic overdeterminated systems},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {191--194},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {58},
     year = {1977},
     mrnumber = {543140},
     zbl = {0411.35020},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1977__58__191_0/}
}
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Bratti, Giuliano. A remark about elliptic overdeterminated systems. Rendiconti del Seminario Matematico della Università di Padova, Tome 58 (1977), pp. 191-194. http://www.numdam.org/item/RSMUP_1977__58__191_0/

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