@article{DE_1999_35_7_a16,
     author = {G. I. Shishkin},
     title = {Optimization of piecewise-uniform grids for singularly perturbed equations of reaction-diffusion type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {990--997},
     publisher = {mathdoc},
     volume = {35},
     number = {7},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_7_a16/}
}