1) W. V. and S. L. Green and M. Victoria (Compiled and Edited): Graphite in High Power Fusion Reactors International Energy Agency Workshop Report Rigi-Kaltbad, Switzerland Oct. 18-21, 1982
2) H. Vernickel: Sixth International Conferance on Plasma Surface Interactions in Cntrolled Fusion Devices, 14-18 May 1894 Nagoya, Japan, to be published in J. Nucl. Mater.