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Chicago:170. Jha, V.V., Jajoo, K.S., Tripathy, B. K. Saleem Durai, M. A.. "An improved monarch butterfly optimization based multivariate fuzzy time series approach for forecasting GDP of India" Example, Volume--issue--Year-2022-1864-5917. https://link.springer.com/article/10.1007/s12065-021-00686-8#citeas.