international journal of operational research
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international journal of operational research
journal of operational research
international journal of operation research
operations research an international journal
american journal of operational research
the european journal of operational research
journal of operational research of china
european journal of operational research sci
journal of the operational research society
european journal of operational research issn
journal of operations research
european journal of operational research ejor
european journal of operation research
international journal of operations
american journal of operations research
journal of the operational
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