Determinants of Portuguese firms financial performance: panel data evidence Elisabete Simões Vieira Maria Elisabete Neves António Gomes Dias Publication Journal: International Journal of Productivity and Performance Management Year of Publication: 2019 Identifiers ISSN: 1741-0401 Other Numbers: 2-s2.0-85068072782 Alternative titles DOIGoogle ScholarBibTeXRIS Locators