@article{wang_zawadzki_akcelrud_2001,  title={Morphology and damping behavior of polyurethane/PMMA simultaneous interpenetrating networks},  volume={4},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392001000100007},  DOI={10.1590/S1516-14392001000100007},  number={1},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Wang, S.H. and Zawadzki, S. and Akcelrud, L.},  year={2001},  month={Jan},  pages={27–33} }