Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Mats Gustafsson and Christian Sohl and Gerhard Kristensson,Physical limitations on antennas of arbitrary shape,"Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences",1364-5021,The Royal Society,2007-07-18,463,2086,2589-2607,https://cir.nii.ac.jp/crid/1361137046142296064,https://doi.org/10.1098/rspa.2007.1893