Asian Conference on Intelligent Information and Database Systems : Intelligent Information and Database Systems Asian Conference on Intelligent Information and Database Systems : Intelligent Information and Database Systems, Apr 2019, Yogyakarta, Indonesia. pp.661-671, ⟨10.1007/978-3-030-14799-0_57⟩ Intelligent Information and Database Systems ISBN: 9783030147983 ACIIDS (1)