Analisis yuridis penentuan penyalahgunaan posisi dominan dalam hukum persaingan usaha di Indonesia : studi terhadap putusan-putusan tahun 2006-2015 komisi pengawas persaingan usaha = Juridical analysis on determination of abuse of dominant position in business competition law in Indonesia : studies of the commission for the supervision of business competition s verdict years 2006-2015