1. Optimal Shape Design as a Material Distribution Problem;BendsøE;Structural Optimization,1989
2. Engineering components grow like trees;Mattheck;Materialwissenschaft und Werkstofftechnik,1990
3. A new method of structural shape optimization based on biological growth;Mattheck;International Journal of Fatigue,1990
4. Mlejnek, H.P. and Schirrmacher, R. (1990). An Engineer's Approach to Optimal Material Distribution and Shape Finding. To be published in Computer Methods in Applied Mechanics and Engineering.
5. Mlejnek, H.P. (1990). Internal studies, not published yet.