Hartini Mardan, Nur, and Norsiah Fauzan. “Quantitative Electroencephalogaphy (QEEG) and Neurofeedback Training (NFT) for Elderly With Mild Cognitive Impairment (MCI)”. International Journal of Engineering & Technology, vol. 7, no. 3.22, Aug. 2018, pp. 32-36, https://doi.org/10.14419/ijet.v7i3.22.17118.