Aguila, D.M., Aday, Z.M., Delos Reyes, A.M.P., Palas, A.K. and Ruiz, H.M.A.M. 2016. Natural zeolite as exhaust filter for the adsorption of carbon monoxide, hydrocarbons, and carbon dioxide emitted by a motor vehicle. International Research Journal on Innovations in Engineering, Science and Technology. 2, (Dec. 2016), 16–20.