@article{IM_1980__61_142762,
     author = {A. Katok},
     title = {Smooth {Non-Bernoulli} {K-Automorphisms.}},
     journal = {Inventiones mathematicae},
     pages = {291--299},
     publisher = {mathdoc},
     volume = {61},
     year = {1980},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__61_142762/}
}