Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 譚 学厚,Simple proof of the lower bound on the average distance from the Fermat-Weber center of a convex object,"東海大学紀要. 情報理工学部 = Proceedings of the School of Information Science and Technology, Tokai University",18812996,平塚 : 東海大学情報理工学部,2010,10,2,1-8,https://cir.nii.ac.jp/crid/1520853834721623936,