Every Kähler metric with a centrally extended Abelian isometry algebra is locally a quotient of a canonical model, and the anomalous isometries can be gauged using twisted chiral superfields.
NonlinearσModels and Their Gauging in and Out of Superspace
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Anomalous symmetries in K\"ahler geometry
Every Kähler metric with a centrally extended Abelian isometry algebra is locally a quotient of a canonical model, and the anomalous isometries can be gauged using twisted chiral superfields.