TY JOUR TI DEVELOPMENT OF VALUATION METHOD OF THE STATUS OF BASE STATIONS FOR DETERMINING THE NEED OF THEIR UPGRADING KW base stations KW modernization KW theory of fuzzy sets KW experts KW indicators of modernization KW fuzzy information KW fuzzy estimates KW decision-making JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Shaposhnikova, N.. AU Sorokin, A.. PY 2017 IS PB Astrakhan State Technical University