@techreport{weko_50279_1,
   author	 = "TSUYOSHI,MURATA",
   title	 = "Structural Analysis of Web User Communities",
   year 	 = "2004",
   institution	 = "National Institute of Informatics/Japan Science and Technology Agency",
   number	 = "125(2004-ICS-138)",
   month	 = "dec"
}