@article{MZM_2000_67_6_a1,
     author = {P. de la Harpe and M. Bucher},
     title = {Free products with amalgamation and {HNN-extensions} of uniformly exponential growth},
     journal = {Matemati\v{c}eskie zametki},
     pages = {811--815},
     publisher = {mathdoc},
     volume = {67},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_67_6_a1/}
}