Perencanaan pengembangan dan analisa keekonomian lapangan gas x di Provinsi Sumatra Utara = Plan of development and economic analysis of x field in North Sumatra Province / Eko Prehantoro

Analisis keekonomian rencana pengembangan pertama lapangan X untuk optimalisasi penerimaan negara bukan pajak = The economic analysis of the first plan of development in the field of X for optimizing non tax government take

Kajian harga gas coalbed methane untuk pembangkit listrik berbahan bakar gas = Study of coalbed methane (CBM) gas price for gas fired power utility

Analisis tekno ekonomi pemanfaatan stranded sumur gas X di perusahaan Y = Techno economic analysis of utilization stranded gas well X at company Y

Keekonomian pemanfaatan dimetil eter sebagai bahan bakar pencampur LPG di sektor rumah tangga di Indonesia melalui kebijakan mandatori pemerintah = The economic of dme utilization as mixing fuel of LPG in household sector in Indonesia through government mandatory