@article{DE_2006_42_5_a12,
     author = {N. N. Nefedov and A. G. Nikitin},
     title = {Method of differential inequalities for step-like contrast structures in singularly perturbed integro-differential equations in the spatially two-dimensional case},
     journal = {Differencialʹnye uravneni\^a},
     pages = {690--700},
     publisher = {mathdoc},
     volume = {42},
     number = {5},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2006_42_5_a12/}
}