Understanding the Determinant Factors of Internet Business Solutions Adoption: The Case of Portuguese Firms
Maria Fraga Martins, Tiago Oliveira
Applied Economics Letters, vol. 18, 2011, p. 1769-1775.

Do Art Specialists Form Unbiased Pre-sale Estimates? An Application for Picasso Paintings
Corinna Czujack, Maria Fraga Martins
Applied Economics Letters, vol. 11, 2004, p. 245-249.

Parametric and Semiparametric Estimation of Sample Selection Models: An Empirical Application to the Female Labour Force in Portugal
Maria Fraga Martins
Journal of Applied Econometrics, vol. 16, 2001, p. 23-39.