TY JOUR TI Full-text Russian-language search in a distributed repository of patent information KW patent search KW distributed system KW Big Data KW Elasticsearch JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Korobkin, D.. AU Fomenkov, S.A. AU Bobunov, A.. PY 2026 IS 2026 PB Astrakhan State Technical University