1. Low frequency sounding technique for predicting progressive failure of rock
2. Brink S. 2015. Development of an acoustic classification system for predicting rock structural stability [Dissertation]. Stellenbosch University.
3. Clausen E, Soerensen A, Uth F, Mitra R, Lehnen F, Schwarze B. 2020. Assessment of the effects of global digitalization trends on sustainability in mining - part I: digitalization processes in the mining industry in the context of sustainability. Commissioned by: Bundesanstalt für Geowissenschaften und Rohstoffe (Federal Institute for Geosciences and Natural Resources), ISBN: 978-3-948532-14-7
4. [accessed 2022 March 21]. https://www.bgr.bund.de/EN/Themen/Min_rohstoffe/Downloads/digitalization_mining_dustainability_part_I_en.html.
5. Green JJ, Hlophe K, Dickens J, Teleka R, Price M. 2011. Mining robotics sensors. 26th International Conference of CAD/CAM, Robotics & Factories of the Future (CARs&FOF 2011); July 26–28; Kuala Lumpur, Malaysia.