@article{MZM_1971_10_5_a5,
     author = {P. M. Tamrazov},
     title = {On the change in moduli under circular symmetrization},
     journal = {Matemati\v{c}eskie zametki},
     pages = {527--532},
     publisher = {mathdoc},
     volume = {10},
     number = {5},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1971_10_5_a5/}
}