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  1. saam, j.c., polyurethane catalysts: chemistry and applications, hanser gardner publications, 2004.
  2. frisch, k.c., "catalysis in polyurethane formation", journal of cellular plastics, vol. 30, no. 5, 1994.
  3. gander, m.j., "delayed action catalysts for rigid polyurethane foams", foam expo europe, 2018.
  4. liu, y., et al., ¡°temperature-responsive catalyst systems for polyurethane foaming¡±, polymer engineering & science, vol. 59, issue 3, 2019.

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