Principal Viticulturist Mark Greenspan, Ph.D. is an active author for wine industry publications. He has contributed a monthly column on timely viticultural topics to Wine Business Monthly continuously for 9 years (over 100 articles and counting!).
Wine Business Monthly no longer provides links to individual articles. Articles may be found by following this link and typing "Greenspan" in the search box: Greenspan WBM Articles
Additional references: (Provided based on timeliness)