[70] Z. Pakieła, M. Giżyński, B. Romelczyk-Baishya, M. Kulczyk, Low-Temperature Fracture of Ultrafine-Grained Iron, Thermec 2018: 10th International conference on processing and manufacturing of advanced materials Edited by:Shabadi, R; Ionescu, M; Jeandin, M; Richard, C; Chandra, T Book Series: Materials Science Forum Volume: 941 pp. 595-600, 2018.