Mini, A. ., A. . Barhoum, and B. Mohammad. “A Study of Structural Changes Embed in Surface Diffusion Layer of Carbon Steel ST-20 Nitrided in Ammonia Furnace 〖NH〗_3”. Latakia University Journal -Basic Sciences Series, vol. 41, no. 3, July 2019, http://www.journal.tishreen.edu.sy/index.php/bassnc/article/view/8831.