[6] The authors acknowledge funding from the ERDF - European Regional Development Fund, through the COMPETE - Operational Competitiveness Programme (COMPETE), and national funds via FCT - Foundation for Science and Technology, under the project PTDC/CVT/115618/2009 and project PEst-C/MAR/LA0015/2013
and further funding from project EUCVOA (NORTE-07-0162-FEDER-000116), co-financed by the North Portugal Regional Operational Program (ON.2, O Novo Norte), National Strategic Reference Framework (NSRF), via the ERDF.
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