1. UU No. 27/2003 tentang Panas Bumi 2. PP No. 59/2007 tentang Kegiatan Usaha Panas Bumi 3. Peraturan Menteri ESDM yang telah terbit : a. No. 005/2007 tentang Pedoman Penugasan Survei Pendahuluan b. No. 11/2008 tentang Tata Cara Penetapan WKP Panas Bumi c. No. 14/2008 tentang Harga Patokan Penjualan Tenaga Listrik dari Pembangkit Listrik Tenaga Panas Bumi d. No. 269-12/2008 tentang Biaya Pokok Penyediaan Tenaga Listrik Tahun 2008 4. Peraturan Menteri Keuangan No. 177 tahun 2007 tentang Pembebasan Bea Masuk 5. Peraturan Menteri Keuangan No. 178 tahun 2007 tentang PPN Ditanggung Pemerintah
Purwantoro, T. (1993), The Reducing of Geothermal Reservoir with Dual-Phase Systems, presented at the Seminar Program conducted by Geological Engineering Department, Engineering Faculty, Gadjah Mada University, June 7-11, 1993, Yogyakarta.
Purwantoro, T. (1994), The Occurrence Patterns of Micro Earthquake in term of Reservoir Charging Characteristics, presented at the Final Session of Writing Papers for Indonesian Technical Students conducted by Society of Petroleum Engineers (IATMI: Ikatan Ahli Teknik Perminyakan Indonesia) KOMDA Jakarta, Sept. 6-7, 1994, Jakarta.
Purwantoro, T. (1999), The Geology of Dieng Geothermal Region Central Java Province (Indonesia) and Monitoring of Micro Earthquake Activity for Studying Characteristics of The Reservoir Recharge, Unpublished Thesis in Engineer (S.T.), Geological Engineering Department, Gadjah Mada University, Yogyakarta.
Purwantoro, T., Dwipa, S. and Sulistijo, B. (2003), Study of Bedrock Configuraton Based Resistivity Modelling To Interpret The Geothermal Trapping Structure In Lesugolo Area, East Nusa Tenggara - Indonesia, presented on the Technical Session in the 6th Annual Meeting and Conference of the Indonesian Geothermal Association, June 16-18, 2003, Bandung.
Purwantoro, T. (2003), Interpretation of Resistivity Data to Interpret the Prospect Zone and Geothermal Potency in the Lesugolo Area, East Nusa Tenggara - Indonesia, Unpublished Thesis in Master of Science (M.T.), Mining Engineering Department, Institute Technology of Bandung.
Purwantoro, T., Boegis, Z, Situmorang, T. and Muchlis, A. (2004), A survey of Temperature Core Hole Drilling In Sokoria Geothermal Prospect Area, East Nusa Tenggara - Indonesia, presented on the Technical Session in the Colloqium of Directorate General Geology and Mineral Resources, Ministry of Energy and Mineral Resources, Republic of Indonesia, February 2004, Bandung.
Purwantoro, T., Arief, R.H. and Suroso, 2005, Laporan Akhir : Workover Sumur HCE-31, HCE-17A, DNG-17, HCE-28, HCE-7A and DNG-9 Lapangan Panasbumi Dieng Jawa Tengah, internal report submitted to management of PT Geo Dipa Energi and Pertamina.
Calibugan, A.A, Wibowo, N.H., Harijoko, A., Wintolo, D. Tarriela, M.R.B., Silitonga, T.H. and Purwantoro, T. (2006), Subsurface Geology and Hydrothermal Alteration in Dieng Geothermal Field, Central, Java, Indonesia, presented on the 3rd International Symposium on Earth Resources and Geological Engineering Education, 3-4 August 2006, Yogyakarta.
Calibugan, A.A, Wibowo, N.H., Harijoko, A., Wintolo, D. Tarriela, M.R.B., Silitonga, T.H. and Purwantoro, T. (2007), Characteristics Of Hydrothermal Alteration in Sikidang Block of Dieng Geothermal Field and Their Implications on Its Reservoir, presented on the 32rd HAGI, the 36th IAGI and the 29th IATMI Annual Convention and Exhibition, Join Convention Bali 2007 in 13-16 November 2007.
Purwantoro, T., Silaban, M. and Suroso, 2008, Evaluasi 6 Wilayah Kerja Pertambangan Panasbumi Yang Akan Dilelang Pemerintah (Seulawah Agam, Cisolok-Cisukarame, Tangkuban Perahu, Tampomas, Ungaran dan Telaga Ngebel), internal report submitted to Management of PT Geo Dipa Energi.