Some uniqueness results for degenerate elliptic operators in two variables
Rendiconti del Seminario Matematico della Università di Padova, Tome 86 (1991), pp. 111-129.
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     author = {Colombini, Ferruccio and Del Santo, Daniele},
     title = {Some uniqueness results for degenerate elliptic operators in two variables},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {111--129},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {86},
     year = {1991},
     mrnumber = {1154102},
     zbl = {0766.35005},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1991__86__111_0/}
}
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Colombini, Ferruccio; Del Santo, Daniele. Some uniqueness results for degenerate elliptic operators in two variables. Rendiconti del Seminario Matematico della Università di Padova, Tome 86 (1991), pp. 111-129. http://archive.numdam.org/item/RSMUP_1991__86__111_0/

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