A. Skilton and P. Choompolpaisal, “The Ancient Theravada Meditation System, Boran Kammatthana: Anapanasati or ‘Mindfulness of The Breath’ in Kammatthan Majjima Baeb Lamdub”, BSRV, vol. 32, no. 2, pp. 207–229, Feb. 2016, doi: 10.1558/bsrv.v32i2.28172.