Katemi, Richard J., and JÃ©rÃ©my Epp. 2019. “Influence of Tempering and Cryogenic Treatment on Retained Austenite and Residual Stresses in Carbonitrided 18CrNiMo7-6 Low Alloy Steel”. Tanzania Journal of Engineering and Technology 38 (1). http://196.44.161.124/index.php/tjet/article/view/2937.