Waiting online: a review and research agenda. - Gerard Ryan; Mireia Valverde (Internet Res., 2003)

Waiting for service on the internet: Defining the phenomenon and identifying the situations. - Gerard Ryan; Mireia Valverde (Internet Res., 2005)

Waiting in line for online services: a qualitative study of the user's perspective. - Gerard Ryan; Mireia Valverde (Inf. Syst. J., 2006)

Special Issue on Qualitative Approaches to E-marketing and Online Consumer Behaviour: Guest Editors' Introduction. - Inma Rodríguez-Ardura; Gerard Ryan; Ulrike Gretzel (J. Theor. Appl. Electron. Commer. Res., 2012)