@article{weko_23549_1,
   author	 = "浅田,圭一 and 井上,允 and 亀野,誠二 and 永井,洋",
   title	 = "Time Variation of the Rotation Measure Gradient in the 3C 273 Jet",
   journal	 = "The Astrophysical Journal",
   year 	 = "2008",
   volume	 = "675",
   number	 = "1",
   pages	 = "79--82"
}