Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Alexandre Ern and Jean-Luc Guermond,Theory and Practice of Finite Elements,Applied Mathematical Sciences,0066-5452,Springer New York,2004,,,,https://cir.nii.ac.jp/crid/1360855571394336000,https://doi.org/10.1007/978-1-4757-4355-5