@article{MZM_1986_40_1_a7,
     author = {M. A. Perel'muter},
     title = {Nonlinear multiplicative inequalities and estimates of gradients of solutions of elliptic equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {75--86},
     publisher = {mathdoc},
     volume = {40},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1986_40_1_a7/}
}