Abbal, P.; Sarris, J.; Pradal, M.; Berger, J.-L.; Robin, J.-P. Influence of the Liquid or Gazeous Nature of the Grape Berries Environment on Rheological Properties and on Colour and Nitrogen Extractabilities During Conditions Simulating the Beaujolais Wine-Making Process. OENO One 1999, 33, 87-98.