Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Andrei Boutyline and Robb Willer,The Social Structure of Political Echo Chambers: Variation in Ideological Homophily in Online Networks,Political Psychology,0162-895X,Wiley,2016-05-05,38,3,551-569,https://cir.nii.ac.jp/crid/1363388843757799808,https://doi.org/10.1111/pops.12337