@article{RM_1980_35_4_a21,
     author = {M. V. Jakobson},
     title = {Invariant measures that are absolutely continuous in $ dx$ for one-parameter families of one-dimensional maps},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {198--199},
     publisher = {mathdoc},
     volume = {35},
     number = {4},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1980_35_4_a21/}
}