Crittenden, P. and H. Lewis (2012), Influencing financial decisions on energy efficiency: six key strategies to build management support, Proceedings of the 2012 ACEEE Summer Study on Energy Efficiency in Buildings, Asilomar, California

Crittenden, P. and Lewis, H., (2011), ‘Accelerating the uptake of energy efficiency in industry – a case study of the Australian Energy Efficiency Opportunities program’. Proceedings for the June 2011 European Council for an Energy Efficient Economy Summer Study

Buelow, S., H. Lewis and K. Sonneveld (2009), ‘The role of labels in directing consumer packaging waste’, Proceedings of the Environmental Research Event 2009, Noosa Heads, Queensland, 10-13 May

Lewis, H. (2006), ‘Product stewardship in the packaging industry: Corporate social responsibility or greenwash?’ Proceedings of the Environment Research Event 2006, Sydney, NSW, 10-13 December

Lewis, H. (2005), ‘Beyond the hype: product stewardship discourse and performance in the Australian packaging industry’, Asia Pacific Researchers in Organization Studies, 11th International Colloquium, Melbourne, Australia, 4-7 December

Gertsakis, J. and H. Lewis (2002), ‘Connecting products and systems’, Enviro 2002 Conference, 8 April, Melbourne