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Estimating trading-day variation in monthly economic time series
Young, Allan, (1965)
Operational time and seasonality in distributed lag estimation
Clark, Peter K., (1974)
Discrete-time martingale convergence results and nonlinear estimation using time-series data
Los, Cornelis A., (1982)
Measuring the Degree of Efficiency of Financial Market
Los, Cornelis, (2004)