Existence and improved regularity for a nonlinear system with collapsing ellipticity Article Sidebar Requires Subscription Download Article PDF Download Article Abstract PDF Submitted: Mar 6, 2019 Accepted: May 19, 2020 Published: Sep 27, 2021 DOI: https://doi.org/10.2422/2036-2145.201903_006 Issue 2021: VOL. XXII, ISSUE 3 Section Article Main Article Content Edgard Pimentel José Miguel Urbano Abstract Article Details