- (2012) Waste to Energy in palm oil industry in Indonesia, in Asian Pacific Landfill Symposium. Bali, Indonesia.
- (2012) Least-cost renewables in Asia-Pacific, in DAAD Alumni Workshop in conjuction with Wind Energy Workshop. Flensburg, Germany.
- (2011) Unlocking potential of biomass to energy in agro-industry, in Environmental Technology and Management Conference, Faculty of Civil and Environmental Engineering. Bandung. (not attending) (poster)
- (2011) Project financing to build geothermal power plants in Indonesia, in World Renewable Energy Congress. Bali, Indonesia.
- (2010) Investment evaluation for building geothermal power plants in Indonesia, in Proceeding of Papers Climate Change Conference. Hamburg.
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