Silva, G. H. ., R. L. . Riche, J. . Molimard, and A. . Vautrin. “Exact and Efficient Interpolation Using Finite Elements Shape Functions”. European Journal of Computational Mechanics, vol. 18, no. 3-4, Aug. 2009, pp. 307-31, doi:10.13052/EJCM.18.307-331.