“…So far this has not been done in full generality as it comes to the boundary conditions. Most papers deal only with clamped or simply supported boundaries, see [29] for conforming C 1 elements, [9,17,29] for the mixed Ciarlet-Raviart method ( [11]), and [8,7,19,14,21,30,22] for discontinuous Galerkin (dG) methods. The few papers that do address more general boundary conditions, in particular free, are [5,20] in which the nonconforming Morley element is analysed, [3,4] where a new mixed method is introduced and analysed, and [19] where a continuous/discontinuous Galerkin method is considered.…”