[1]
Frentz, M., Garofalo, N., Götmark, E., Munive, I. and Nyström, K. 2012. Non-divergence form parabolic equations associated with non-commuting vector fields: boundary behavior of nonnegative solutions. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE. 11, 2 (Jul. 2012), 437-474. DOI:https://doi.org/10.2422/2036-2145.201007_004.