1. Braun, M. (1999). Continuous and discrete elastic structures. Proceedings of the Estonian Academy of Sciences, 48:174–188.
2. Braun, M. (2000). Compatibility conditions for discrete elastic structures. Rendiconti del Seminario Matematico, Universitd e Politecnico Torino, 58:37–48.
3. Epstein, M. and Maugin, G. A. (1990). The energy-momentum tensor and material uniformity in finite elasticity. Ada Mechanica, 83:127–133.