@article{MZM_1998_63_3_a5,
     author = {V. A. Dobrynskii},
     title = {On the absence of cycles for unimodal mappings of the square},
     journal = {Matemati\v{c}eskie zametki},
     pages = {370--378},
     publisher = {mathdoc},
     volume = {63},
     number = {3},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1998_63_3_a5/}
}