@article{CMFD_2017_63_4_a0,
     author = {H.-O. Walther},
     title = {Maps which are continuously differentiable in the sense of {Michal} and {Bastiani} but not of {Fr\'echet}},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {543--556},
     publisher = {mathdoc},
     volume = {63},
     number = {4},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2017_63_4_a0/}
}