Nielson, Gregory M. “A Triangle Interpolant With Linear Coefficients Based Upon the Fundamental Bilinear Interpolant of Mangeron”. Anal. Numér. Théor. Approx. 13, no. 2 (August 1, 1984): 155–161. Accessed May 20, 2024. https://ictp.acad.ro/jnaat/journal/article/view/1984-vol13-no2-art6.