Here's a little from Jancis Robinson's Oxford Second:
Other DOCs include Lugana, whose Trebbiano-based white wines are produced to the south of Lake Garda. Botticino and Cellatica are red blends (the former[in Lombardy] with a slight suggestion of sweetness) from Schiava, Barbera, and Marzemino grapes grown in the province of Brescia and served with the local versions of pot-au-feu or wine-laced stews. Riviera del Garda are light red and rosé wines produced on the western shore of Lake Garda in the image of Bardolino across the lake as it were, although the grapes (Groppello, Sangiovese, Barbera, and Marzemino) could not be more different. [I'm sure the third edition has more info, but I've lent out my copy.]
Italian Made has some good information as well.
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