@article{RM_1984_39_4_a6,
     author = {N. M. Dobrovol'skii},
     title = {An~effective proof of {Roth's} theorem on quadratic dispersion},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {117--118},
     publisher = {mathdoc},
     volume = {39},
     number = {4},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1984_39_4_a6/}
}