León Bermúdez, A.Y. and Salazar, R. 2008. Synthesis and characterization of the polystyrene - asphaltene graft copolymer by FT-IR spectroscopy. CT&F - Ciencia, Tecnología y Futuro. 3, 4 (Dec. 2008), 157–167. DOI:https://doi.org/10.29047/01225383.469.