Manzini, Raffaella; Noci, Giuliano; Ostinelli, Massimiliano; Pizzurno, Emanuele (March 2006). "Assessing environmental product declaration opportunities: a reference framework". Business Strategy and the Environment. 15 (2): 118–134. doi:10.1002/bse.453.
Minkov, Nikolay; Schneider, Laura; Lehmann, Annekatrin; Finkbeiner, Matthias (May 2015). "Type III Environmental Declaration Programmes and harmonization of product category rules: status quo and practical challenges". Journal of Cleaner Production. 94: 235–246. Bibcode:2015JCPro..94..235M. doi:10.1016/j.jclepro.2015.02.012.
Ingwersen, Wesley W.; Stevenson, Martha J. (2012). "Can we compare the environmental performance of this product to that one? An update on the development of product category rules and future challenges toward alignment". Journal of Cleaner Production. 24: 102–108. Bibcode:2012JCPro..24..102I. doi:10.1016/j.jclepro.2011.10.040.
Almeida, Marisa Isabel; Dias, Ana Cláudia; Demertzi, Martha; Arroja, Luís (April 2015). "Contribution to the development of product category rules for ceramic bricks". Journal of Cleaner Production. 92: 206–215. Bibcode:2015JCPro..92..206A. doi:10.1016/j.jclepro.2014.12.073. hdl:10773/16706.
Subramanian, Vairavan; Ingwersen, Wesley; Hensler, Connie; Collie, Heather (August 2012). "Comparing product category rules from different programs: learned outcomes towards global alignment". The International Journal of Life Cycle Assessment. 17 (7): 892–903. Bibcode:2012IJLCA..17..892S. doi:10.1007/s11367-012-0419-6.
Hunsager, Einar Aalen; Bach, Martin; Breuer, Lutz (April 2014). "An institutional analysis of EPD programs and a global PCR registry". The International Journal of Life Cycle Assessment. 19 (4): 786–795. Bibcode:2014IJLCA..19..786H. doi:10.1007/s11367-014-0711-8.
Almeida, Marisa Isabel; Dias, Ana Cláudia; Demertzi, Martha; Arroja, Luís (April 2015). "Contribution to the development of product category rules for ceramic bricks". Journal of Cleaner Production. 92: 206–215. Bibcode:2015JCPro..92..206A. doi:10.1016/j.jclepro.2014.12.073. hdl:10773/16706.
Minkov, Nikolay; Schneider, Laura; Lehmann, Annekatrin; Finkbeiner, Matthias (May 2015). "Type III Environmental Declaration Programmes and harmonization of product category rules: status quo and practical challenges". Journal of Cleaner Production. 94: 235–246. Bibcode:2015JCPro..94..235M. doi:10.1016/j.jclepro.2015.02.012.
Ingwersen, Wesley W.; Stevenson, Martha J. (2012). "Can we compare the environmental performance of this product to that one? An update on the development of product category rules and future challenges toward alignment". Journal of Cleaner Production. 24: 102–108. Bibcode:2012JCPro..24..102I. doi:10.1016/j.jclepro.2011.10.040.
Almeida, Marisa Isabel; Dias, Ana Cláudia; Demertzi, Martha; Arroja, Luís (April 2015). "Contribution to the development of product category rules for ceramic bricks". Journal of Cleaner Production. 92: 206–215. Bibcode:2015JCPro..92..206A. doi:10.1016/j.jclepro.2014.12.073. hdl:10773/16706.
Subramanian, Vairavan; Ingwersen, Wesley; Hensler, Connie; Collie, Heather (August 2012). "Comparing product category rules from different programs: learned outcomes towards global alignment". The International Journal of Life Cycle Assessment. 17 (7): 892–903. Bibcode:2012IJLCA..17..892S. doi:10.1007/s11367-012-0419-6.
Hunsager, Einar Aalen; Bach, Martin; Breuer, Lutz (April 2014). "An institutional analysis of EPD programs and a global PCR registry". The International Journal of Life Cycle Assessment. 19 (4): 786–795. Bibcode:2014IJLCA..19..786H. doi:10.1007/s11367-014-0711-8.