(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.