Yingram, M. (2019) “TWO-LEVEL VOLTAGE SHIFT OF ACTIVE ISLANDING DETECTION METHOD OF DISTRIBUTED GENERATION”, Research Journal Phranakhon Rajabhat : Science and Technology, 15(2), pp. 95–110. available at: https://li01.tci-thaijo.org/index.php/PRRJ_Scitech/article/view/170667 (accessed: 11 September 2026).