Subharmonicity and convexity properties of Bernstein polynomials and Bézier nets on triangles. - J. Lorente-Pardo; Paul Sablonnière; M. C. Serrano-Pérez (Comput. Aided Geom. Des., 1999)

On the convexity of C1 surfaces associated with some quadrilateral finite elements. - J. Lorente-Pardo; Paul Sablonnière; M. C. Serrano-Pérez (Adv. Comput. Math., 2000)