@article{GFA_1994__4_6_58167,
     author = {E. Rips and Z. Sela},
     title = {Structure and {Regidity} in {Hyperbolic} {Groups.} {I.}},
     journal = {Geometric and functional analysis},
     pages = {337--372},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1994},
     zbl = {0818.20042},
     url = {http://geodesic.mathdoc.fr/item/GFA_1994__4_6_58167/}
}