Nuno Luís Madureira https://www.cepese.pt/portal%26amp%26quot%26quot%26quot%26quot/en/publications/authors/nuno-luis-madureira https://www.cepese.pt/portal%26amp%26quot%26quot%26quot%26quot/@@site-logo/CEPESE+home.png Nuno Luís Madureira Artigos Opportunity and Chance: The Introduction of Sampling Techniques in Portugal 2003