00515naa#a2200157#i#450# EN\\bibl\124096 20260605015528.5 2782-4586 20260530b2026####ek#y0engy0150####ca RU Assessment of the economic efficiency of RAG and Fine‑tuning solutions for corporate analytics based on Large Language Models Journal article Moscow ITBO University 2026 10 с. Journal article local Lykov Artem Valer'evich zhpi.ru