Chenghu, C., S. Wicha, and R. Chaisricharoen. “Analysing the EEG Signal Effectiveness of Chiang Rai Arabica Drip Coffee on Individual Human Brainwave”. ECTI Transactions on Computer and Information Technology (ECTI-CIT), vol. 13, no. 2, Nov. 2019, pp. 178-87, doi:10.37936/ecti-cit.2019132.194581.