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- h. ulrich, chemistry and technology of polyols for polyurethanes, 2nd edition, hanser publishers, 2018.
- m. szycher, szycher’s handbook of polyurethanes, crc press, 2019.
- r. n. nazar¨¦, et al., ¡°catalyst systems in polyurethane foams: a review¡±, journal of cellular plastics, vol. 56, no. 4, 2020.
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