1. Alonso-Álvarez, L. (2012). The value of water: The origins and expansion of thermal tourism in Spain, 1750–2010. Journal of Tourism History, 4(1), 15–34.
2. Bell, M. (1993). ‘The pestilence that walketh in darkness’: Imperial health, gender and images of South Africa c. 1880–1910. Transactions of the Institute of British Geographers, 18, 327–341.
3. Boekstein, M. (2012). Revitalising the healing tradition – Health tourism potential of thermal springs in the Western Cape. [Doctoral dissertation]. Cape Peninsula University of Technology.
4. Boekstein, M. (2014a). Tourism, health and the changing role of health springs – Should South Africa reposition its thermal spring tourism product? African Journal of Hospitality, Tourism and Leisure, 3(2), 1–9.
5. Boekstein, M. (2014b). Healing waters: Balneological classification of thermal springs in South Africa. African Journal for Physical Health Education, Recreation and Dance, 20(21), 557–568.