1.
Potrykus A. A Symbolic Calculus and a Parametrix Construction for Pseudodifferential Operators with Non-Smooth Negative Definite Symbols. Rev. mat. complut. [Internet]. 2009 Mar. 11 [cited 2024 May 20];22(1):187-20. Available from: https://doi.org/10.5209/rev_REMA.2009.v22.n1.16347