1.ASM Handbook. Vol.2, Properties and Selection: Nonferrous Alloys and Special-Purpose Material. 10th edition, ASM International, 2000, 1328p. ISBN 0-87170-378-5
2.Alcock,C.B.: Thermochemical processes:principles and models. Butterworth-Heinemann, Oxford OX2 8DP, 2001, pp.371 ISBN 0 7506 5155 5