@article{RMI_2000_2000_1_a8,
     author = {Hoh, Walter},
     title = {Operadores pseudodiferenciales con s{\'\i}mbolos definidos negativos de orden variable.},
     journal = {Revista matem\'atica iberoamericana},
     pages = {219-241},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2000_2000_1_a8/}
}