@article{article7e813848,
title   = {An approximate threshold condition for non-autonomous system:: an aplication to a vector-borne infection},
author = {Coutinho, F. A. B and Burattini, Marcelo Nascimento and Lopez, L. F. and Massad, Eduardo},
year = {2005},
doi = {10.1016/j.matcom.2005.06.003},
journal   = {Mathematics and computers in simulation}
}