DIBENEDETTO, E.; GIANAZZA, U.; VESPRI, V. Forward, backward and elliptic Harnack inequalities for non-negative solutions to certain singular parabolic partial differential equations. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, [S. l.], v. 9, n. 2, p. 385-422, 2010. DOI: 10.2422/2036-2145.2010.2.06. Disponível em: http://20.103.181.36/index.php/annaliscienze/article/view/208. Acesso em: 27 may. 2025.