Koval YМ, Fedak ІО. Selection of low-resistant reservoir rocks in geological cross-section of Helvetian deposits at Letnianske field. ogpe [Internet]. 2020 Dec. 29 [cited 2024 Dec. 4];(2(34):7-14. Available from: https://nge.nung.edu.ua/index.php/nge/article/view/535