@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040064, author = {Liu, Xuefeng and Kikuchi, Fumio}, issue = {1}, journal = {Journal of mathematical sciences, the University of Tokyo}, month = {Jul}, pages = {27--78}, title = {Analysis and Estimation of Error Constants for P0 and P1 Interpolations over Triangular Finite Elements}, volume = {17}, year = {2010} }