Decomposing school and school-type efficiency. - Maria Conceição A. Silva Portela; Emmanuel Thanassoulis (Eur. J. Oper. Res., 2001)

Negative data in DEA: a directional distance approach applied to bank branches. - Maria Conceição A. Silva Portela; Emmanuel Thanassoulis; Gary Simpson (J. Oper. Res. Soc., 2004)

Profitability of a sample of Portuguese bank branches and its decomposition into technical and allocative components. - Maria Conceição A. Silva Portela; Emmanuel Thanassoulis (Eur. J. Oper. Res., 2005)

Zero weights and non-zero slacks: Different solutions to the same problem. - Maria Conceição A. Silva Portela; Emmanuel Thanassoulis (Ann. Oper. Res., 2006)

Comparative efficiency analysis of Portuguese bank branches. - Maria Conceição A. Silva Portela; Emmanuel Thanassoulis (Eur. J. Oper. Res., 2007)

Developing a decomposable measure of profit efficiency using DEA. - Maria C. A. S. Portela; Emmanuel Thanassoulis (J. Oper. Res. Soc., 2007)

Efficiency analysis accounting for internal and external non-discretionary factors. - Ana S. Camanho; Maria Conceição A. Silva Portela; Clara B. Vaz (Comput. Oper. Res., 2009)

The measurement of relative efficiency using data envelopment analysis with assurance regions that link inputs and outputs. - Masoud Khalili; Ana S. Camanho; Maria Conceição A. Silva Portela; M. R. Alirezaee 001 (Eur. J. Oper. Res., 2010)

An improvement on the Tracy and Chen model 'A generalized model for weight restrictions in DEA'. - Masoud Khalili; Ana S. Camanho; Maria C. A. S. Portela; M. R. Alirezaee 001 (J. Oper. Res. Soc., 2010)

Analysis of complementary methodologies for the estimation of school value added. - Maria Conceição A. Silva Portela; Ana S. Camanho (J. Oper. Res. Soc., 2010)

Productivity change in the water industry in England and Wales: application of the meta-Malmquist index. - Maria Conceição A. Silva Portela; Emmanuel Thanassoulis; A. Horncastle; T. Maugg (J. Oper. Res. Soc., 2011)

Estimating the scope for savings in referrals and drug prescription costs in the general Practice units of a UK primary care trust. - Emmanuel Thanassoulis; Maria Conceição A. Silva Portela; Mike Graveney (Eur. J. Oper. Res., 2012)

Performance assessment of secondary schools: the snapshot of a country taken by DEA. - Maria Conceição A. Silva Portela; Ana S. Camanho; Diogo Nóvoa Borges (J. Oper. Res. Soc., 2012)

The Assessment of Performance of Educational Services: The Case of Portuguese Secondary Schools. - Maria Conceição A. Silva Portela; Ana S. Camanho (IESS, 2016)

Identifying the scope for savings at inpatient episode level: An illustration applying DEA to chronic obstructive pulmonary disease. - Emmanuel Thanassoulis; Maria Conceição A. Silva Portela; Mike Graveney (Eur. J. Oper. Res., 2016)

Efficiency in education. - Jill Johnes; Maria C. A. S. Portela; Emmanuel Thanassoulis (J. Oper. Res. Soc., 2017)

Preface: International conference on data envelopment analysis - DEA40, 16-18 April 2018. - Emmanuel Thanassoulis; Maria C. A. S. Portela; Victor V. Podinovski (Ann. Oper. Res., 2020)

A literature review of economic efficiency assessments using Data Envelopment Analysis. - Ana Santos Camanho; Maria Conceição A. Silva Portela; Fabio Sartori Piran; Daniel Pacheco Lacerda (Eur. J. Oper. Res., 2024)