[1]
González-Guzmán, J. and González-Yáñez, B. 2018. Local stability results on a model for typhoid fever with a core group. Proyecciones (Antofagasta, On line). 12, 2 (Apr. 2018), 161-169. DOI:https://doi.org/10.22199/S07160917.1993.0002.00007.