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  1. saam, j.c., polyurethane catalysts: chemistry and applications, hanser gardner publications, 2004.
  2. frisch, k.c., & cheng, s.h., recent advances in polyurethane technology, crc press, 2008.
  3. liu, y., et al., "delayed action catalysts for rigid polyurethane foams", journal of cellular plastics, vol. 45, no. 3, pp. 221¨C234, 2009.

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