Content externalism and phenomenal character: a new worry about privileged access. - Jonathan Ellis (Synth., 2007)

Using Mobile Phones to Nurture Social Networks. - Daniele Quercia; Jonathan Ellis; Licia Capra (IEEE Pervasive Comput., 2010)

In the Mood for Being Influential on Twitter. - Daniele Quercia; Jonathan Ellis; Licia Capra; Jon Crowcroft (SocialCom/PASSAT, 2011)

Tracking "gross community happiness" from tweets. - Daniele Quercia; Jonathan Ellis; Licia Capra; Jon Crowcroft (CSCW, 2012)