Funding for this research was provided by:
Fundação para a Ciência e a Tecnologia (PD/BD/113969/2015, PTCD/EEI-SII/6608/2014)
Fundação para a Ciência e a Tecnologia (UID/CEC/00127/2013)
Programa Operacional Factores de Competitividade – COMPETE
Article History
Received: 24 August 2018
Revised: 23 January 2019
Accepted: 28 January 2019
First Online: 5 February 2019