@article{azevedo_nascimento_chierice_claro neto_lepienski_2013,  title={UV and gamma irradiation effects on surface properties of polyurethane derivate from castor oil},  volume={23},  ISSN={0104-1428},  url={https://doi.org/10.4322/polimeros.2013.087},  DOI={10.4322/polimeros.2013.087},  number={3},  journal={Polímeros},  publisher={Associação Brasileira de Polímeros},  author={Azevedo, Elaine C. and Nascimento, Eduardo M. and Chierice, Gilberto O. and Claro Neto, Salvador and Lepienski, Carlos M.},  year={2013},  pages={305–311} }