@article{RMC_2009_2009_1_a13,
     author = {Potrykus, Alexander},
     title = {A symbolic calculus and a parametrix construction for pseudodifferential operators with non-smooth negative definite symbols.},
     journal = {Revista matem\'atica complutense},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMC_2009_2009_1_a13/}
}