Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleEnveloping spectral surfaces: covariate dependent spectral analysis of categorical time series.AuthorsKrafty, Robert T.; Xiong, Shuangyan; Stoffer, David S.; Buysse, Daniel J.; Hall, MarticaPublicationJournal of Time Series Analysis, 2012, Vol 33, Issue 5, p797ISSN0143-9782Publication typeArticleDOI10.1111/j.1467-9892.2011.00773.x