Changes in physico-chemical characteristics of robusta coffee (Coffea canephora) during natural process using simple solar dryerHarijono, Mohamad Farhan Wicaksono, Siti Narsito Wulan and Dego Yusa AliBIO Web Conf., 90 (2024) 01003DOI: https://doi.org/10.1051/bioconf/20249001003