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http://www.dlorg.eu/uploads/External%20Publications/6.1.pdf
2. CEPS: Evaluation Study supporting the interim evaluation of the $${\rm ISA}^2$$ programme $${\rm ISA}^2$$, European Union (2019). ISBN 978-92-76-02074-5,
https://www.ceps.eu/wp-content/uploads/2019/06/NO0119341ENN.en_.pdf
3. EC COM(2015) 192. A Digital Single Market Strategy for Europe, Brussels, 06 May 2015.
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