Kalashnikov, O., S. Budniak, Y. Ivanov, Y. Belyansky, N. Aptulina, and A. Zobnin. ‚ÄúCOMPARISON OF GAZKONDNAFTA AND HYSYS SOFTWARE SYSTEMS IN THE FIELD OF COMPUTER MODELING OF OIL AND GAS TECHNOLOGIES‚ÄĚ. Energy Technologies & Resource Saving, no. 3, Sept. 2021, pp. 4-22, doi:10.33070/etars.3.2021.01.