@article{RM_1986_41_4_a0,
     author = {A. V. Babin and M. I. Vishik},
     title = {Unstable invariant sets of semigroups of non-linear operators and their perturbations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--41},
     publisher = {mathdoc},
     volume = {41},
     number = {4},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1986_41_4_a0/}
}