Two methods of port vinification: a comparison of changes during fermentation and of characteristics of the wines.

Bakker J., Bellworthy S. J., Hogg T. A., Kirby R. M., Reader H. P., Rogerson F. S. S., Watkins S. J., Barnett J. A.. (1996)

American Journal of Enology and Viticulture, 47, 37-41