Penyederhanaan Perizinan Pasca Peraturan Presiden Nomor 91 Tahun 2017 tentang Percepatan Pelaksanaan Berusaha Khususnya Perizinan Pertambangan Mineral dan Batubara = Simplification of Permits Post Presidential Regulation No. 91 of 2017 concerning the Acceleration of Business Actions Specially for Mineral and Coal Minning Licences - Vitanova Saputri, author (Fakultas Hukum Universitas Indonesia, 2020)