Balogh, Zoltan M; Koskela, Pekka; Rogovin, Sari (2007). Absolute continuity of quasiconformal mappings on curves. Geometric and functional analysis, 17(3), pp. 645-664. Basel: Birkhäuser-Verlag; www.birkhäuser.ch 10.1007/s00039-007-0607-x
