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2. Cultivation of medicinal and aromatic plants for specialty industrial materials
3. L. E. Craker ‘Medicinal and Aromatic Plants–Future Opportunities’ in ‘New crops and new uses’ Eds. J. Janick A. Whipkey ASHS Press Alexandria VA 2007 pp. 248–257.
4. WHO Global Health Estimates ‘The top ten causes of death’ 2016 World Health Organization 2018 Geneva https://www.who.int/news-room/fact-sheets/detail/the-top-10-causes-of-death.
5. ‘WHO global report on traditional and complementary medicine 2019’ World Health Organization 2019 Geneva Licence: CC BY-NC-SA 3.0 IGO.