Savuliak, V. I., and D. V. Bakalets. “Influence of Cracks Healing by Copper Alloys on Durability of Steel Constructions”. Visnyk of Vinnytsia Politechnical Institute, no. 4, Nov. 2010, pp. 172-5, https://visnyk.vntu.edu.ua/index.php/visnyk/article/view/1295.