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  1. h. ulrich, chemistry and technology of polyols for polyurethanes, rapra technology limited, 2005.
  2. m. szycher, szycher’s handbook of polyurethanes, crc press, 1999.
  3. g. oertel (ed.), polyurethane handbook, hanser publishers, 2nd edition, 1994.
  4. y. he et al., ¡°catalytic effects of organobismuth compounds on waterborne polyurethane systems¡±, progress in organic coatings, vol. 135, 2019.

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