EDI, Industry Structure and Competition in European Markets. - Niels Bjørn-Andersen; Ramon O'Callaghan; Joachim Griese; Tawfik Jelassi; Pieter M. A. Ribbers (ICIS, 1993)

A transaction-based approach to strategic information systems formulation. - Ramon O'Callaghan; Rafael Andreu (ECIS, 1994)

Electronic markets in the air cargo community. - Ellen Christiaanse; John Been; Tonja van Diepen; Ramon O'Callaghan (ECIS, 1995)

Panel: How to model and manage IT diffusion? - Jan Pries-Heje; Richard L. Baskerville; Karlheinz Kautz; Ramon O'Callaghan; Gonzalo León Serrano (ECIS, 1996)

Panel: Doing and writing up case research: Issues and practices. - Ellen Christiaanse; Ramon O'Callaghan; Edgar A. Whitley; Leslie P. Willcocks (ECIS, 1998)

Information technology governance by design: investigating hybrid configurations and integration mechanisms. - Ryan Peterson 001; Ramon O'Callaghan; Pieter M. A. Ribbers (ICIS, 2000)

A Strategy Development Process for Enterprise Content Management. - Ramon O'Callaghan; Martin Smits (ECIS, 2005)

Knowledge Dynamics in Regional Economies: A Research Framework. - Ramon O'Callaghan; Rafael Andreu (HICSS, 2006)

Fixing the Payment System at Alvalade XXI. - Ramon O'Callaghan (ICIS, 2006)

Fixing the payment system at Alvalade XXI: a case on IT project risk management. - Ramon O'Callaghan (J. Inf. Technol., 2007)