@article{EMJ_2013_4_2_a1,
     author = {S. G. Basalaev and S. K. Vodopyanov},
     title = {Approximate differentiability of mappings of {Carnot--Carath\'eodory} spaces},
     journal = {Eurasian mathematical journal},
     pages = {10--48},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EMJ_2013_4_2_a1/}
}