Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kenta Kobayashi and Takuya Tsuchiya,A Babuška-Aziz type proof of the circumradius condition,Japan Journal of Industrial and Applied Mathematics,0916-7005,Springer Science and Business Media LLC,2013-09-27,31,1,193-210,https://cir.nii.ac.jp/crid/1360004231556379648,https://doi.org/10.1007/s13160-013-0128-y