1. J.B. ARMITAGE and A.O. SCHMIDT (1949) Influence of Steel Hardness in Face Milling, Trans. A.S.M.E. 71, p. 413
2. S. TOUR and L.S. FLETCHER (1949) Hot Spot Machining, Iron Age 164, p. 78.
3. E.T. ARMSTRONG, A.S. COSLER and E.F. KATZ (1951) Machining of Heated Metals, Trans. A.S.M.E. 73, p. 35.
4. E.J. KRABACHER and M.E. MERCHANT (1951) Basic Factors in Hot Machining of Metals, Trans. A.S.M.E. 73, p. 761.
5. W. PENTLAND, J.L. WENNBERG and C.L. MEHL (1961/2) Research in Machining High Strength Materials at Elevated Temperatures, Int. J. Prod. Res. 1, p. 25.