1. The OECD innovation strategy: getting a head start on tomorrow. Published May 2010 by OECD.org (ISBN 978-92-64-08470-4). www.oecd.org/sti/theoecdinnovationstrategygettingaheadstartontomorrow.htm.
2. Measuring innovation output in Europe: towards a new indicator. Published 2016 OECD.org. http://ec.europa.eu/research/innovation-union/index_en.cfm?pg=output.
3. McGregor J. Are patents the measure of innovation? Bloomberg article. www.bloomberg.com/news/articles/2007-05-04/are-patents-the-measure-of-innovation-businessweek-business-news-stock-market-and-financial-advice.
4. Patent landscaping for life sciences innovation: toward consistent and transparent practices
5. Subudhi S. What makes immunotherapy a promising treatment for prostate cancer?” www.cancerresearch.org/prostate-cancer.