Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yuji SHIGEHIRO,The Derivation of Electromagnetic Potential and Lorentz Force in Invariant Form,"電気学会研究会資料. EMT = The papers of technical meeting on electromagnetic theory, IEE Japan",,東京 : 電気学会,2019-11,2019,103-152,235-240,https://cir.nii.ac.jp/crid/1520290884994862464,