“…For details of p-FEM based on integrated Legendre-polynomials, see [55] and [12], and for a bio-mechanical application [59]. In particular, [40] compare classical h-element formulations (linear and quadratic shape functions for hexahedral and tetrahedral elements on the basis of Lagrange-polynomials), a mixed element formulation (linear and quadratic ansatz functions with constant and linear approaches for the dilatational and pressure degree of freedom based on the proposal of [51] or [52]) and p-version finite elements. It is shown that for a particular error measure, the specific quadratic, mixed elements are comparable with higherorder elements (which cannot be generalized to include other mixed element formulations).…”