Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Kenneth Eriksson and Donald Estep and Claes Johnson,Piecewise Linear Approximation,Applied Mathematics: Body and Soul,,Springer Berlin Heidelberg,2004,,,741-753,https://cir.nii.ac.jp/crid/1363951796225166208,https://doi.org/10.1007/978-3-662-05798-8_26