1. Proc. 1st and 2nd Carbon Conf.;Collins,1956
2. The irreversible expansion of carbon bodies during graphitization
3. 12th Biennial Conference on Carbon, American Carbon Society;Fitzer,1975
4. Proc. 5th London Int. Conf. on Carbon and Graphite, Soc. Chem. Ind.;Heintz,1978