B. Wang, P. Kry, Y. Deng, U. Ascher, H. Huang and B. Chen 2018,
arXiv1808.04931:
Neural material: learning elastic constitutive material and damping models from sparse data
K. van den Doel, U. Ascher and E. Haber,
in ``Large Scale Inverse Problems'', M. Cullen, M. Freitag, S. Kindernmann
and R. Scheichl (Eds.), de Gryter (2013), 181-203:
The lost honour of l2-based regularization.