Frohman, Charles A, and Ramón Mira de Orduña Heidinger. “The Substratostat - an Automated Near-Infrared Spectroscopy-Based Variable-Feed System for Fed-Batch Fermentation of Grape Must”. OENO One 52, no. 4 (December 7, 2018). Accessed June 18, 2019. https://oeno-one.eu/article/view/2199.