@article{articled84d0d1a,
title   = {Spacelike Surfaces in L4 with null mean curvature vector and the nonlinear Riccati partial differential equation},
author = {Dussan, Martha P and Franco Filho, Antonio de Padua and Simões, P.},
year = {2021},
doi = {10.1016/j.na.2021.112271},
publisher = {Elsevier},
journal   = {Nonlinear Analysis}
}