@article{FORUM_1991__3_2_186407,
     author = {Manfred Denker and Mariusz Urbanski},
     title = {Absolutely {Continuous} {Invariant} {Measures} for {Expansive} {Rational} {Maps} with {Rationally} {Indifferent} {Periodic} {Points.}},
     journal = {Forum mathematicum},
     pages = {561--580},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1991},
     zbl = {0745.28008},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1991__3_2_186407/}
}