1. 1) ISO 556 : Coke (greater than 20 mm in size)-Determination of mechanical strength.
2. 2) ASTM D 3402 : Standard Test Method for Tumbler Test for Coke.
3. 3) Carbonization Research Report 5 : Studies of Coke Degradation in Different Drum Tests, The British Carbonization Research Association, Chesterfield, (1974).
4. 4) K.Kojima, T.Nishi, T.Yamaguchi, H.Nakama and S.Ida : Tetsu-to-Hagané, 62 (1976), 110.
5. 5) K.Takeda, K.Igawa, S.Taguchi, M.Kiguchi, Y.Senoo and S.Tamura : CAMP-ISIJ, 3 (1990), 10.