Fix the list of edges of the Quad8
Poro / X-FEM: a mass conservation problem
Poro: visualization of the pressure fields
Poro / X-FEM: Validation of K_t
Poro / X-FEM: computation of the submatrix [Kfs]
Poro / X-FEM: New three fields model (Hansbo)
X-FEM: Three fields formulation for poroelasticity
Mechanics: define (2D) quadratic elements