1. Gazan G.A., How to make a good hole better, SME Technical Paper MR77-461, 1977.
2. Ibid, Better holes by ballizing. Tool and Manufacturing Engineer, Sept., 1966, pp. 54-56.
3. Ibid, Ballizing - a high-production tool. Tooling and Production, Oct., 1968, pp. 69-90.
4. Anon., Hole-Finish, Use of oversize high-precision balls: the ‘Ballizing’ Process Aircraft Production, Jan, 1961, pp. 36-38.
5. Anon., Ballizing, Application of a technique for sizing and surface-finishing holes in metal parts. Machinery and Production Engineering, March 1970, pp. 388-90.