Geodesic
Gauging of $SL(2,R)$ WZNW models and the Liouville field
Teoretičeskaâ i matematičeskaâ fizika, Tome 98 (1994) no. 3, pp. 337-342

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We consider the gauging of $SL(2,R)$ WZNW model by its nilpotent subgroup $E(1)$. The resulting space-time of the corresponding $\sigma$ model is seen to collapse to one dimensional field theory of Liouville. 
@article{TMF_1994_98_3_a3,
     author = {F. Ardalan},
     title = {Gauging of $SL(2,R)$ {WZNW} models and the {Liouville} field},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {337--342},
     publisher = {mathdoc},
     volume = {98},
     number = {3},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1994_98_3_a3/}
}
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F. Ardalan. Gauging of $SL(2,R)$ WZNW models and the Liouville field. Teoretičeskaâ i matematičeskaâ fizika, Tome 98 (1994) no. 3, pp. 337-342. http://geodesic.mathdoc.fr/item/TMF_1994_98_3_a3/