Investigating Mere-Presence Effects of Recommendations on the Consumer Choice Process. - Sören Köcher; Dietmar Jannach; Michael Jugovac; Hartmut H. Holzmüller (IntRS@RecSys, 2016)

"Likes" as social rewards: Their role in online social comparison and decisions to like other People's selfies. - Astrid M. Rosenthal-von der Pütten; Matthias R. Hastall; Sören Köcher; Christian Meske; Timo Heinrich; Franziska Labrenz; Sebastian Ocklenburg (Comput. Hum. Behav., 2019)