Jiang Qian, Xiquan Shi, Jinming Wu & Dianxuan Gong. (2022). Construction of Cubature Formulas via Bivariate Quadratic Spline Spaces over Non-Uniform Type-2 Triangulation.
            <i>Journal of Computational Mathematics</i>. <i>40</i> (2).
            205-230.
         doi:10.4208/jcm.2008-m2020-0077