Arinto Yudi Ponco Wardoyo, Hari Arief Dharmawan, Muhammad Nurhuda and Arif Budianto 2020. ULTRAFINE PARTICLE FILTER DESIGN FOR MOTORCYCLE EMISSION EXHAUST SYSTEM: A HIGH VOLTAGE ELECTROSTATIC-BASED SYSTEM . GEOMATE Journal. 18, 67 (Mar. 2020), 57–62.