1. The Brundtland report: ‘Our common future’;Keeble;Med. War.,1988
2. Conceptualizing sustainability assessment;Pope;Environ. Impact Assess. Rev.,2004
3. Review of corporate environmental indicators;Herva;J. Clean. Prod.,2011
4. Categorizing tools for sustainability assessment;Ness;Ecol. Econ., Jan.,2007
5. D. Carrig, ‘Glass straws? Straw straws? Here are some eco-friendly alternatives to plastic’, USA Today Online, 23 May, 2008. Available: https://www.usatoday.com/story/money/nation-now/2018/05/23/sustainable-alternatives-plastic-straws-recyling/632993002/ (accessed 28 February 2020).