A Three Dimensional Web Quality Model. - Julián Ruiz; Coral Calero; Mario Piattini (ICWE, 2003)

Classifying Web Metrics. - Julián Ruiz; Coral Calero; Mario Piattini (Software Audit and Metrics, 2004)

A Web Metrics Survey Using WQM. - Coral Calero; Julián Ruiz; Mario Piattini (ICWE, 2004)

Classifying web metrics using the web quality model. - Coral Calero; Julián Ruiz; Mario Piattini (Online Inf. Rev., 2005)

Web metrics selection through a practitioners' survey. - Julián Ruiz; Coral Calero; Mario Piattini (ICSOFT (1), 2006)