@article{TRSPY_1994_205_a7,
     author = {B. S. Kruglikov},
     title = {On the extension of the symplectic form and a~pair of functions in involution form $S^1\times I\times T^2$},
     journal = {Informatics and Automation},
     pages = {98--108},
     publisher = {mathdoc},
     volume = {205},
     year = {1994},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1994_205_a7/}
}