@article{MZ_1995__220_1_174820,
     author = {A. Alexandrou Himonas},
     title = {On degenerate elliptic operators of infinite type.},
     journal = {Mathematische Zeitschrift},
     pages = {449--460},
     publisher = {mathdoc},
     volume = {220},
     number = {1},
     year = {1995},
     zbl = {0843.35020},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174820/}
}