Author of the books The Great Energy Transition in the European Union, Volumes 1 and 2 (2020), Solutions for sustainability (2019), EU Trade Law (2019), Energy Security, Trade and the EU (2016), The European Energy Union (2016), International Energy Governance (2014), Climate Change and International Trade (2013), International Trade and Investment Law (2010) and Theory and Practice of EC External Trade Law and Policy (2008) and the editor/co-editor of EU Energy Law and Policy: The External Dimension (2020), International Trade, Investment and the Rule of Law (2020), the Commentary on the Energy Charter Treaty (2018), University Initiatives in Climate Change Mitigation and Adaptation (2018), and Research Handbook on EU Energy Law and Policy (2017).