@article{AA_2019_31_3_a1,
     author = {S.-S. Byun and D. K. Palagachev and L. G. Softova},
     title = {Survey on gradient estimates for nonlinear elliptic equations in various function spaces},
     journal = {Algebra i analiz},
     pages = {10--35},
     publisher = {mathdoc},
     volume = {31},
     number = {3},
     year = {2019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AA_2019_31_3_a1/}
}