This is the only information I could find:
http://sites.netscape.net/mokgwetsi/recipes
CITRON MARTINI
1 and 1/4 oz. Absolut Citron
Dash of Extra Dry Vermouth
Pour Absolut Citron and vermouth over ice. Shake or stir well. Strain and
serve in a coctail glass straight-up or over ice. Garnish with a twist.
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I would try this recipe.
Absolute Citron Martini
3 oz. Absolut Citron
Dash of Extra Dry Vermouth
Coat the rim of a martini glass with lemon juice and dip the rim into Kosher
Salt. Pour Absolut Citron and extra-dry vermouth over ice in a shaker. Strain
the ingredients into the sugar-coated martini glass. Garnish with a twist.