Interpolation error estimates in W1, p for degenerate Q1 isoparametric elements. - Gabriel Acosta; Gabriel Monzón (Numerische Mathematik, 2006)

The minimal angle condition for quadrilateral finite elements of arbitrary degree. - Gabriel Acosta; Gabriel Monzón (J. Comput. Appl. Math., 2017)

Anisotropic interpolation error estimate for arbitrary quadrilateral isoparametric elements. - Gabriel Monzón (Numerische Mathematik, 2019)