@article{article14ac52c0,
title   = {Singular perturbation of nonlinear systems with regular singularity},
author = {Marchetti, Domingos Humberto Urbano and Conti, William Remo Pedroso},
year = {2018},
doi = {10.1155/2018/5163492},
journal   = {Discrete Dynamics in Nature and Society}
}