Parabolic equations relative to vector fields. Bieske, Thomas (2008) Electronic Journal of Differential Equations (EJDE) [electronic only]
Perturbative methods in scales of Banach spaces: applications for Gevrey regularity of solutions to semilinear partial differential equations. Gramchev, T. (2003) Rendiconti del Seminario Matematico
Power Series Spaces and Weighted Solution Spaces of Partial Differential Equations. Michael Langenbruch (1987) Mathematische Zeitschrift