@article{nakata_ishihara, 
  title={Analysis on Magnetic Characteristics of Three-Phase Core-Type Transformers (Part I: Fundamental Equations and Linear Solutions)}, 
  volume={6}, 
  DOI={10.18926/15643}, 
  number={1}, 
  publisher={岡山大学工学部}, 
  author={Nakata, Takayoshi and Ishihara, Yoshiyuki}
  }