1. Collyer K, Mullan H, Timan N (2017) Measuring market power in multi-sided markets. Summer CPI Antitrust Chronicle 1(3):8. www.competitionpolicyinternational.com/wp-content/uploads/2017/09/CPI-Collyer-Mullan-Timan.pdf. Accessed 21 Dec 2017
2. Ezrachi A, Stucke ME (2015) The curious case of competition and quality. J Antitrust Enforcement 3:227
3. Graef I (2016) EU competition law, data protection and online platforms: data as essential facility. Wolters Kluwer
4. Harbour PJ (2007) Dissenting statement of commissioner Pamela Jones Harbour—in the matter of Google/Doubleclick F.T.C. File No. 071-0170. Federal Trade Commission, p 4. www.ftc.gov/sites/default/files/documents/public_statements/statement-matter-google/doubleclick/071220harbour_0.pdf. Accessed 10 Jan 2018
5. Newman JM (2016) Antitrust in zero-price markets: applications. Wash U L Rev 49 94:64–69