SCRIPTA METALLURGICA, vol. 21, no. 11, page. 1595 - 1596, 1987-11
SCRIPTA METALLURGICA, vol. 23, no. 6, page. 995 - 1000, 1989-06
SCRIPTA METALLURGICA, vol. 22, no. 1, page. 59 - 64, 1988-01