I will maintain this post updated with my last and most relevant works in English. Don´t hesitate to contact me if you are interested in getting more info about any of the following works:
2018 - You get what you give: Sharing as a new radical challenge for journalism (pdf).
2017 - Sharing media content in social media: The challenges and opportunities of UDC (pdf).
2016 - Flows of communication and influentials in Twitter. A comparative approach (pdf).
2013 - Emerging Topics in the Research on Digital Audiences and Participation (pdf).
2013 - The Role of the Media Industry when Participation is a Product (pdf).
2013 - How open are journalists on Twitter? (pdf).
2012 - Audience Interactivity & Participation / Interview-Essays with Academics (pdf).
You can check a more detailed profile in Google Scholar.