@article{MZM_1977_22_1_a3,
     author = {Ya. B. Pesin},
     title = {Description of $\pi$-partition of a~diffeomorphism with invariant measure},
     journal = {Matemati\v{c}eskie zametki},
     pages = {29--44},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_1_a3/}
}