@article{article0655cafd,
title   = {Limit cycles in uniform isochronous centers of discontinuous differential systems with four zones},
author = {Itikawa, Jackson and Llibre, Jaume and Mereu, Ana Cristina and Oliveira, Regilene Delazari dos Santos},
year = {2017},
doi = {10.3934/dcdsb.2017136},
journal   = {Discrete and Continuous Dynamical Systems - Series B}
}