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2. invited paper prepared for “Symposium on Glass Science and Technology, Vienna, Austria: Problems and Prospects for 2004”;Ovshinsky,1984
3. Reversible Electrical Switching Phenomena in Disordered Structures
4. The Physics of Amorphous Solids;Zallen,1983
5. Proc. 5th Int. Conf. on Amorphous and Liquid Semiconductors;Ovshinsky,1974