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Real-time signal extraction with regularized multivariate direct filter approach
Buss, Ginters, (2016)
Forecasting in business and economics
Granger, C. W. J., (1980)
Business Forecasting
Gross, C. W., (1983)
Metodi di calcolo e di eliminazione delle fluttuazioni stagionali variabili
Marruco, Enrico, (1961)