%0 Journal Article %A Góra, P. %A Boyarsky, A. %T Compactness of Invariant Densities for Families of Expanding, Piecewise Monotonic Transformations %J Canadian journal of mathematics %D 1989 %P 855-869 %V 41 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1989-039-8/ %R 10.4153/CJM-1989-039-8 %F 10_4153_CJM_1989_039_8