Pengaruh konsentrasi starter, lama fermentasi, dan konsentrasi gula terhadap karakteristik kimia dan antioksidan sider belimbing (averrhoa carambola l.) = Effect of starter concentration, fermentation time, and sugar concentration toward chemical and antioxidant characteristics of starfruit cider (averrhoa Carambola l.) - Bara, Lukas Tunggak (2018)