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A General Approach to the Limiting Distribution for Estimators in Time Series Regression with Nonstable Autoregressive Errors.
Nabeya, Seiji, (1990)
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