Kim Yang-Su, Yu Hae-Chul, 2008, Electric Railway Engineering, DONGIL publisher, pp. 225-244

Han Mun-Seob, Lee Jang-Mu, 2002, Optimization of installation position of auto-transformer in AC AT feeding system, Korean Institute of Electrical Engineers Conference Proceedings, pp. 1248-1250

Kim Jeong-Cheol, 2008, Interpretation of feeding system and understanding of Korean railway electricity, Book publisher GIDALI, pp. 311-348

Korea Railway Authority , 2014, Railway design manuals and guidelines(Electric Power manual : KR E-02040 Spacing and location of substation Rev.5)

Kim Baeg, 2006, Electric Power Engineering, Book publisher GIDALI, pp. 116-123

Choe Seung-Hyeog, 2011, A Study on the Effect of the Auto Transformer for the Terminal Supplementary Feeding Class in the Electric Railway Feeding System, Seoul National University of Science and Technology Graduate School of Railway Master Thesis