I. Trebulova, G. Kogut, A. K. M. K. “Experience of Operation of Electronic Database of Full-Text Standards HAMMER in PJSC "Ukrtransgaz"”. JOURNAL OF HYDROCARBON POWER ENGINEERING, Vol. 4, no. 2, Sept. 2018, pp. 80-88, http://ogpe.nung.edu.ua/index.php/jhpe/article/view/68.