@article{CMFD_2003_3_a3,
     author = {R. Sch\"afke},
     title = {Inverse {Problems} in the {Theory} of {Singular} {Perturbations}},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {63--88},
     publisher = {mathdoc},
     volume = {3},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2003_3_a3/}
}