TY  - JOUR
AU  - P. I. Topalov
TI  - The inclusion of the Klein bottles in the theory of the topological classification of Hamiltonian systems
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1994
SP  - 248
EP  - 250
VL  - 49
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1994_49_1_a18/
LA  - en
ID  - RM_1994_49_1_a18
ER  -