ISHTIAQ, M., Ahmed, F., Saleem, B., Ali, L., Inam, A. and Tabish, T.A. 2014. Effect of Post Heat-treatment on Hardness and Case Depth of 17NiCrMo6-4 Gear Steel after Liquid Carburizing. Journal of the Pakistan Institute of Chemical Engineers. 42, 2 (Nov. 2014), 85–90.