[1] http://katedry.fmmi.vsb.cz/Opory_FMMI/633/633-Greger-Kovani.pdf
[2] HAŠEK, V. et al. Kování. Praha: SNTL, 1965.
[3] ALTAN, T., G. NGAILE and G. SHEN. Cold and Hot Forging: Fundamentals and Applications. Materials Park Ohio: ASM International, 2005. ISBN 0-87170-805-1.
[4] SEMIATIN, S.L. et al. Metalworking: Bulk Forming. Materials Park Ohio: ASM International, 2005. ISBN 978-0-87170-708-6 .