@article{BUMI_2001_8_4A_3_a18,
     author = {Formica, Maria Rosaria},
     title = {Operatori ellittici degeneri a coefficienti in {EXP}},
     journal = {Bollettino della Unione matematica italiana},
     pages = {451--454},
     publisher = {mathdoc},
     volume = {Ser. 8, 4A},
     number = {3},
     year = {2001},
     zbl = {1053.47510},
     mrnumber = {1741764},
     language = {it},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2001_8_4A_3_a18/}
}