Горбійчук, М. І., and Я. І. Заячук. “OPTIMAL CONTROL OF GAS COMPRESSOR UNITS AT THE COMPRESSION STATION TAKING INTO ACCOUNT THEIR TECHNICAL STATE”. Oil and Gas Power Engineering, no. 3(16), Oct. 2011, pp. 41-53, https://nge.nung.edu.ua/index.php/nge/article/view/68.