Шавранський, В. М., and М. В. Шавранський. “BASES OF FUZZY INTELLECTUAL SUPPORT SYSTEM OF DECISION-MAKING (ISPPR) WHITE OIL AND GAS WELL DRILLING IN CONDITIONS OF COMPLICATIONS”. Oil and Gas Power Engineering, no. 3(16), Oct. 2011, pp. 72-85, https://nge.nung.edu.ua/index.php/nge/article/view/74.