Place flour, cane juice, yeast and 4 eggs in the bowl of an electric mixer fitted with a dough hook. Mix on high until combined. Reduce speed to medium and add salt, both zests, and remaining 3 eggs one at a time until dough starts to pull away from the sides of the bowl. Place dough in a floured bowl and cover with a damp cloth. Let rest at room temperature for 3 hours. When doubled in volume, punch down, cover with plastic wrap and refrigerate for 1 hour. Remove from refrigerator, punch down the dough, wrap with plastic again and refrigerate overnight.