Spatial patterns in a vegetation model with internal competition and feedback regulation Salih Djilali, Soufiane Bentout, Behzad Ghanbari and Sunil Kumar Eur. Phys. J. Plus, 136 2 (2021) 256 Published online: 24 February 2021 DOI: 10.1140/epjp/s13360-021-01251-z