Funding for this research was provided by:
Spanish Ministry of Economics (ECO2017-85503-R, ECO2015-64330-P)
Spanish Ministry of Economics (ECO2014-52372-P, ECO2014-52372-P)
Magyar Tudományos Akadémia (Janos Bolyai Research Scholarship)
Hungarian Scientific Research Fund (119683)
National Research, Development & Innovation (K 119683)
Spanish Ministry of Economics (ECO2014-52372-P)
Article History
Received: 3 April 2017
Revised: 30 October 2019
Accepted: 8 November 2019
First Online: 12 February 2020