@article{MZM_2000_68_3_a3,
     author = {I. V. Dobrynina},
     title = {On the width in free products with amalgamation},
     journal = {Matemati\v{c}eskie zametki},
     pages = {353--359},
     publisher = {mathdoc},
     volume = {68},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_68_3_a3/}
}