1. Modulated structures in the system TiO2-SnO2
2. Phase equilibria in the system Cr2O3-Al2O3
3. 3A. Neuhaus ; p.237 inPhysics and Chemistry of High Pressures . Edited by the Society of Chemical Industry, London. Gordon and Breach, Science Publishers, Inc., New York, 1963 .
4. 4R. E. Barks ; Ph.D. Thesis , The Pennsylvania State University, University Park, 1966 ; p.172 .