“AJARAN SIFAT MELAWAN HUKUM MATERIIL SEBAGAI UPAYA HARMONISASI KETENTUAN HUKUM PIDANA PORNOGRAFI MELALUI INTERNET: The Teaching of the Material Unlawful Nature as an Effort to Harmonize Criminal Law Provisions on Internet Pornography” (2017) Indonesian Journal of Criminal Law Studies, 2(1), pp. 27–39. doi:10.15294/e6rjt032.