The transaction costs theory in international business research: a bibliometric study over three decades. - Manuel Portugal Ferreira; Cláudia Frias Pinto; Fernando Ribeiro Serra (Scientometrics, 2014)

Structural and longitudinal analysis of the knowledge base on spin-off research. - Manuel Portugal Ferreira; Nuno Rosa Reis; Roberta M. Paula; Cláudia Frias Pinto (Scientometrics, 2017)