I don't know if could you please help me find these papers,
I'd be very grateful
Ibrahimbegovic, Adnan. 1993. “Quadrilateral Elements for Analysis of Thick and Thin Plates,” Computer Methods in Applied Mechanics and Engineering. Vol. 110 (1993). 195-209.
A. Ibrahimbegovic. Plate quadrilateral finite element with incompatible modes. Communications in Applied Numerical Methods, 8:497–504, 1992.
K.-J. Bathe and E. Dvorkin. A four-node plate bending element based on mindlin-reissner plate theory and a mixed interpolation. Int. J. Numer. Methods Eng., 21:367–383, 1985.
A. Ibrahimbegovic and E.L. Wilson, Thick shell and solid finite elements with independent rotation fields, Internat. J. Numer. Methods Engrg. 31 (1991) 1393-1414.
A. lbrahimbegovic and E.L. Wilson, A unified formulation for triangular and quadrilateral flat shell finite elements with six nodal degrees of freedom. Commun. Appl. Numer. Methods 7 (1991) 1-9.
thanks in advanced