L. A. Cabaraban, W. B. Juera, M. J. Ruiz-Betco, H. Tamalla-Cabigayan, A. V. Gregorio, and M. Doblas, “Artificial Intelligence Chatbots in Philippine Tourism: An Extended Technology Acceptance Model of Trust, Privacy Concerns, Service Quality, and Booking Intention”, IRMM, vol. 16, no. 6, pp. 336–346, Sep. 2026.