1. Proc. 4th Int. Conf. on Ion Implantation: Equipment and Techniques,1983
2. Proc. 5th Int. Conf. on Ion Implantation: Equipment and Techniques,1985
3. Proc. Int. Conf. on Surface Modification of Metals by Ion Beams;Goktepe,1985
4. Proc. Int. Conf. On Ion Implantation Equipment;Holmes,1979