1. Glossary of Climate Change Acronyms (UNFCCC): http://unfccc.int/essential_background/glossary/items/3666.php.
2. A new EPO classification scheme for climate change mitigation technologies;Veefkind;World Pat. Inf.,2012
3. Ann, C. (2011). Green Technology and the Patent System - Encounter of the Third Kind?, Bardehle Pagenberg, symposium “Patents on Green Technology”, Munich, October 2011.
4. New ways to green patents;Kohll;Cah. Sci. - Rev. Tech. Luxembg.,2010
5. Picard, F. (2011). Environment-friendly technologies and entrepreneurship: what do we learn about patents data? 6th Annual Conference of the European Policy for Intellectual Property Association: Fine-tuning IPR debates,http://www.epip.eu/conferences/epip06/papers/Parallel%20Session%20Papers/PICARD%20Fabienne.pdf.