Cheng, C.-P. ., M. T. . Phung, C.-L. . Hsiao, D.-B. . Shen, and B.-S. . Chen. “Impact of Operational Risk Toward the Efficiency of Banking - Evidence from Taiwans Banking Industry”. Asian Economic and Financial Review, vol. 8, no. 6, June 2018, pp. 815-31, doi:10.18488/journal.aefr.2018.86.815.831.