Douglas C. Schmidt, Larry E. Druffel. An iterative algorithm for placement and assignment of integrated circuits. In Robert B. Hitchcock Sr., Donald J. Humcke, Stephen A. Szygenda, editors, Proceedings of the 12th Design Automation Conference, DAC '75, Boston, Massachusetts, USA, June 23-25, 1975. pages 361-368, ACM, 1975. [doi]