I Putu Yoga Laksana, Ni Made Ratminingsih, Made Hery Santosa, I Putu Indra Kusuma, and Thijs Hemmer, “The Effect of Gemini AI-enhanced E-portfolios on Students’ Speaking Performance: A Quantitative Analysis in ESP Context”, JASL, vol. 10, no. 1, pp. 16–25, Jun. 2026.