Cesana, P., Della Porta, F., Rüland, A., Zillinger, C., & Zwicknagl, B. (2020). Exact constructions in the (non-linear) planar theory of elasticity: from elastic crystals to nematic elastomers. Archive for rational mechanics and analysis, 237(1), 383-445. doi:10.1007/s00205-020-01511-9.