Kesediaan membayar (willingness to pay) retribusi pelayanan persampahan kebersihan hunian apartemen di Provinsi DKI Jakarta per unit per bulan = willingness to pay waste cleaning services retribution residential apartment in Province of DKI Jakarta per unit per month

Analisis kualitatif pengendalian kritikal perusahaan tambang batubara PT X di Kalimantan Tengah = Qualitative analysis of critical controls on a coal mining company PT X in Central Kalimantan

Pengelolaan air asam tambang kegiatan pertambangan batubara terbuka dan kemungkinan dampak pada kesehatan kulit masyarakat pemanfaat sungai (suatu kajian di PT. X, Kabupaten Murung Raya, Provinsi Kalimantan Tengah) = Acid mine drainage management of open pit coal mining activities and possibility impact on skin health of river water-users community (a study in PT. X, Murung Raya District ,Central Kalimantan Province) / Rio Febrianto

Estimation of willingness to pay for tsunami early warning instrument: case study of LTS usage in Sunda Strait for Banten Province = Estimasi kesediaan membayar untuk instrumen alat pendeteksi dini tsunami: studi kasus penggunaan LTS di Selat Sunda untuk Provinsi Banten

Pengaruh Amandemen Kontrak Karya Batubara terhadap Performa Keuangan Perusahaan-perusahaan Tambang Batu Bara Studi Kasus atas Perusahaan-perusahaan Tambang Batubara di Indonesia = Impact Amendment Coal Contract of Work toward Coal Mining Companies`s Financial Performance Case Study in Indonesian Mining Companies