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Aproximate Distributions of the Periodogram and Related Statistics under Normality
Nabeya, Seiji, (1986)
A General Approach to the Limiting Distribution for Estimators in Time Series Regression with Nonstable Autoregressive Errors.
Nabeya, Seiji, (1990)
A general approach to the limiting distribution for estimators in time series regression with nonstable autoregressive errors