Complex sentence: MFA requires practitioners to make precise use of the terms'material','substance', or'good', as laid out, for example, in chapter 2.1 of Brunner and Rechberger, one of the main references for the MFA method.
Split into simpler sentences: MFA requires practitioners to make precise use of the terms'material','substance', or'good'. We refer to the definitions given in chapter 2.1 in the book by Brunner and Rechberger, one of the main references for the MFA method.