Bergamasco, Adalberto P.; Nunes, Wagner V. L.; Zani, Sérgio Luís Global analytic hypoellipticity and pseudoperiodic functions. (English) Zbl 0979.35036 Mat. Contemp. 18, 43-57 (2000). MSC: 35H10 35N05 35F05 PDFBibTeX XMLCite \textit{A. P. Bergamasco} et al., Mat. Contemp. 18, 43--57 (2000; Zbl 0979.35036)
Bergamasco, Adalberto P.; Meziani, Abdelhamid Semiglobal solvability of a class of planar vector fields of infinite type. (English) Zbl 0983.35036 Mat. Contemp. 18, 31-42 (2000). Reviewer: Petar Popivanov (Sofia) MSC: 35F05 35A05 PDFBibTeX XMLCite \textit{A. P. Bergamasco} and \textit{A. Meziani}, Mat. Contemp. 18, 31--42 (2000; Zbl 0983.35036)