Identitas Dan Eksistensi: Keadaan Musik Underground di Bandung (1990-1999) = Identity and Existence: The State of Underground Music in Bandung (1990-1999)

Musik Hard Bass sebagai identitas Subkultur Gopnik di Saint Petersburg = Hard Bass Music as an identity of Gopnik Subculture in Saint Petersburg

Estimasi underground economy tingkat provinsi di Indonesia = Estimation of underground economi at provincial level in Indonesia

Underground economy di Indonesia setelah krisis keuangan global = Underground economy in Indonesia after global financial crisis

Hubungan Underground Economy Terhadap Ketimpangan Pendapatan di Indonesia = Relationship of The Underground Economy to Income Inequality in Indonesia