Effects of Reticence, Affect for Communication Channels, and Self-Perceived Competence on Usage of Instant Messaging - Kelly, Lynne and Keaten, James A. and Hazel, Michael and Williams, Jason A. (Communication Research Reports, 2010)
https://katalog.adlr.link/Record/ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTA4MC8wODgyNDA5MTAwMzczODA0MA