@article{05381016,
title = {Local stability of mappings with bounded distortion on Heisenberg groups.},
journal = {Sibirskij Matematicheskij Zhurnal},
volume = {48},
year = {2007},
pages = {1228-1245},
zbl = {1164.30363},
language = {en},
url = {http://dml.mathdoc.fr/item/05381016}
}
Isangulova, D.V. Local stability of mappings with bounded distortion on Heisenberg groups.. Sibirskij Matematicheskij Zhurnal, Tome 48 (2007) pp. 1228-1245. http://gdmltest.u-ga.fr/item/05381016/