@article{INTO_1999_67_a2,
     author = {L. S. Efremova},
     title = {On the concept of the $\Omega$-function of the skew product of interval mappings},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {129--160},
     publisher = {mathdoc},
     volume = {67},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_1999_67_a2/}
}