@article{KUTGS_2003_24_a13,
     author = {S. E. Stepanov and I. G. Shandra},
     title = {The seven classes of harmonic diffeomorphisms and their geometry},
     journal = {Trudy Geometricheskogo Seminara},
     pages = {139--154},
     publisher = {mathdoc},
     volume = {24},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUTGS_2003_24_a13/}
}