@techreport{weko_209349_1,
   author	 = "Chunyang,He and Masao,Takaku",
   title	 = "Keyword extraction method using users' mouse behavior",
   year 	 = "2021",
   institution	 = "University of tsukuba, University of tsukuba",
   number	 = "2",
   month	 = "feb"
}