N. Hartini Mardan and N. Fauzan, “Quantitative Electroencephalogaphy (QEEG) and Neurofeedback Training (NFT) for Elderly with Mild Cognitive Impairment (MCI)”, IJET, vol. 7, no. 3.22, pp. 32–36, Aug. 2018, doi: 10.14419/ijet.v7i3.22.17118.