1. N. F. KAZAKOV: 'Diffusion welding in a vacuum'; 1968, Moscow, Mas-chinstroenie. (Wright-Paterson AFB translation FM-MT-24 419 68, 1969, Federal aearinghouse, USA)
2. P. M. BARTLE: Paper 50, 'Advances in welding processes', 4th Int. Conf., Harrogate, May 1978, Welding Institute.