@article{MZM_1993_54_2_a9,
     author = {S. Ya. Serovaǐskiǐ},
     title = {Optimization in a nonlinear elliptic system with control in the coefficients},
     journal = {Matemati\v{c}eskie zametki},
     pages = {85--95},
     publisher = {mathdoc},
     volume = {54},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_54_2_a9/}
}