1) T. Kawai and K. Kondou : New Beam and Plate Bending Elements in Finite Element Analysis, short communication of the “Seisan Kenkyu”, Vol. 28, No. 9, September, 1976.
2) A. Sawczuk and T. Jaeger : Grenztragfahigkeits Theorie der Platten, Springer-Verlag, Berlin, Gottingen, Heidelberg, 1963.
3) M. A. Save and C. E. Massonnet : Plastic Analysis and Design of Plates, Shells and Disks, North-Holland Publishing Company, Amsterdam, London, 1972.