Olawuwo, S., V. Viakhireva, A. Demarev, C. Kassaw, N. Nazarov, and V. Demareva. “UnnMindFlex: A Prototype Mobile Application and Case Study on HRV-Guided Cognitive Enhancement”. Journal on Interactive Systems, vol. 16, no. 1, Oct. 2025, pp. 954-61, doi:10.5753/jis.2025.5574.