1. V. A. Strizhalo, L. S. Novogrudskii, and E. V. Vorob'ev,Strength of Alloys Designed for Cryogenic Engineering under the Action of Electromagnetic Fields [in Russian], Naukova Dumka, Kiev (1990).
2. GOST 25.506-85. Strength Analysis and Tests Methods for Mechanical Testing of Metals. Determination of the Characteristics of Crack Resistance (Fracture Toughness) under Static Loading [in Russian], Introduced on 01. 01. 1986 (1986).