Mohd Yusoff, N. S.; Suhaimin, M. F.; Hainulah, S. N. D.; Shaifuddin, S.; Adna, N.; Mat Rani, R. Efficiency of Digital Transformation in the EU-27: A Sequential Bi-Objective MCDEA BCC, Super-Efficiency and Slack-Based Measure Framework. JISED 2026, 11, 851-866.