@article{IM_1979__55_186137,
     author = {Peter J. Kahn},
     title = {Counting {Types} of {Rigid} {Frameworks.}},
     journal = {Inventiones mathematicae},
     pages = {297--308},
     publisher = {mathdoc},
     volume = {55},
     year = {1979},
     zbl = {0427.51010},
     url = {http://geodesic.mathdoc.fr/item/IM_1979__55_186137/}
}