Тимків, Дмитро Федорович, et al. “BASES OF DEVELOPMENT OF METHODS OF ADJUSTING OF OFFICE HOURS OF THE DIFFICULT GAS-TRANSPORT SYSTEMS”. PRECARPATHIAN BULLETIN OF THE SHEVCHENKO SCIENTIFIC SOCIETY. Number, no. 1(5), Mar. 2019, pp. 269-76, https://pvntsh.nung.edu.ua/index.php/number/article/view/327.