These files contains both the sample papers collected through the string search for the systematic mapping study (including all rejected, duplicate and accepted papers) and the final sample of papers accepted, with the snowballed files. The excel file [name: SMS-RE-GDPR-whole sample.xlsx] includes the whole sample: accepted, rejected and duplicates. The reason on why the research paper might have been rejected is included in the excel files. Comments on the papers have been omitted, as they may include personal data from the authors and/or disclose their identity. Please note that the snowballed papers are not included (as at the end of the process, 3 more papers where included in the final sample). The final sample of accepted papers is on the bib [name:final-sample.bib] include the final sample of paper of the mapping study, including the snowballed papers.