1. Measuring maintenance performance using a balanced scorecard approach
2. Brojo, F. (2014) F., Cabrita, C., Matias, J., Fonseca, D., & Vaz, P. (2014). Six Sigma Maintenance Scorecard Methodology and Case Study. Research Gate
3. Cabrita, C. P. (2009a). Contribution for the Knowledge of the Probabilistic and Statistic Basis of the Six Sigma Philosophy: Caracterization of the Six Sigma Business Scorecard. Portuguese Technical Journal of Maintenance.
4. Cabrita, C. P. (2009b). Probabilistic and Statistic Basis of the Six Sigma Philosophy. Portuguese Technical Journal of Maintenance.
5. CEN. (2007). Maintenance - Maintenance Key Performance Indicators: BS EN 15341:2007. 3, 32.