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| Klinkel S.; Gruttmann F., Wagner W.; A Robust Non-linear Solid Shell Element Based on a Mixed Variational Formulation, Computer Methods in Applied Mechanics and Engineering 195, 179 – 201, 2006 |
| Klinkel S., Gruttmann F., Wagner W.; A Continuum Based 3D-Shell Element for Laminated Structures, Computers & Structures 71, 43–62, 1999 |