Performance of A Portable NIR Spectrometer to Distinguish Coffee Species Based on Qualitative Chemometric and Artificial Neural Network (ANN) ModelsAgus Dharmawan, Rudiati Evi Masithoh and Hanim Zuhrotul AmanahBIO Web Conf., 80 (2023) 06007DOI: https://doi.org/10.1051/bioconf/20238006007