@article{Hallahan:2009jM, author = "Hallahan, Redmond and Gabuzda, Denise", title = "{Variability on Decaparsec scales of a number of BL Lac objects }", doi = "10.22323/1.063.0040", journal = "PoS", year = 2009, volume = "BLAZARS2008", pages = "040" }