González Parra, Gilberto, Abraham J Arenas, and Miladys Cogollo. 2017. “Positivity and Boundedness of Solutions for a Stochastic Seasonal Epidemiological Model for Respiratory Syncytial Virus (RSV)”. Ingeniería Y Ciencia 13 (25):95-121. https://doi.org/10.17230/ingciencia.13.25.4.