BRAMANTI, M. W2,p a priori estimates for nonvariational operators: the sharp maximal function technique. Bruno Pini Mathematical Analysis Seminar, [S. l.], v. 9, n. 1, p. 1–19, 2018. DOI: 10.6092/issn.2240-2829/8939. Disponível em: https://mathematicalanalysis.unibo.it/article/view/8939. Acesso em: 29 apr. 2024.