[Issues Involved with the Seasonal Adjustment of Economic Time Series]: Comment: On Dips in the Spectrum of a Seasonally Adjusted Time Series
评论了季节调整后时间序列谱中出现的凹陷现象，讨论了其成因及对经济数据分析的影响。
Craig F. Ansley, William E. Wecker, [Issues Involved with the Seasonal Adjustment of Economic Time Series]: Comment: On Dips in the Spectrum of a Seasonally Adjusted Time Series, Journal of Business & Economic Statistics, Vol. 2, No. 4 (Oct., 1984), pp. 323-324