Jolly, N., P. Minnaar, M. Booyse, and P. Gerber. “Bottle Fermented Sparkling Wine: Cork or Crown Closures During the Second Fermentation?”. South African Journal of Enology and Viticulture 42, no. 2 (August 17, 2021): 136–153. Accessed March 5, 2026. https://www.journals.ac.za/sajev/article/view/4522.