Homogenization design method for biomorphic composite materials
R.H.W. Hoppe, S. Petrova, Journal of Computational Methods in Sciences and Engineering 4 (2004) 87–96.

Applications of Primal-dual Interior Methods in Structural Optimization
R.H.W. Hoppe, S. Petrova, Computational Methods in Applied Mathematics 3 (2003) 159–176.