Assertion: lignin's value | /r/HasProperty | de carvalho
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Source sentences:
text: For the elastic modulus of lignin phenolic foams, values ranging from 2.16 MPa to 12.8 MPa have been reported (de Carvalho and Frollini 2002; Lee et al. 2002; de Carvalho et al. 2003; Hu et al. 2012, 2013; Li et al. 2017).