@article{RM_1982_37_5_a0,
     author = {S. P. Novikov},
     title = {The {Hamiltonian} formalism and a~many-valued analogue of {Morse} theory},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--56},
     publisher = {mathdoc},
     volume = {37},
     number = {5},
     year = {1982},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1982_37_5_a0/}
}