RT null T1 Achmad Solikhin A1 United Nations Environment Programme, K1 energy efficiency YR 2018 FD 2018 LK https://wedocs.unep.org/handle/20.500.11822/25250 UL https://wedocs.unep.org/handle/20.500.11822/25250 NO Achmad Solikhin DS UN Environment Document Repository RD Sep 22, 2026