@article{SIGMA_2008_4_a40,
     author = {Victor D. Gershun},
     title = {Integrable {String} {Models} in {Terms} of {Chiral} {Invariants} of $\mathrm{SU}(n)$, $\mathrm{SO}(n)$,},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2008},
     volume = {4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2008_4_a40/}
}