anam, M. K., E. Emerlada, S. Erlinda, T. Tashid, and T. Nasution. “The Application of Usability Testing to Analyze the Quality of Android-Based Acupressure Smart Chair Applications”. MATRIK : Jurnal Manajemen, Teknik Informatika Dan Rekayasa Komputer, Vol. 22, no. 2, Mar. 2023, pp. 217-26, doi:https://doi.org/10.30812/matrik.v22i2.2312.