Development and Evaluation of an Attendance Tracking System Using Smartphones with GPS and NFC. - Te-Wei Chiang; Cheng-Ying Yang; Gwo-Jen Chiou; Frank Yeong-Sung Lin; Yi-Nan Lin; Victor R. L. Shen; Tong-Ying Tony Juang; Chia-Yang Lin (Appl. Artif. Intell., 2022)