@article{IM_1980__59_142737,
     author = {Feliks Przytycki},
     title = {An {Upper} {Estimation} for {Topological} {Entropy} of {Diffeomorphisms.}},
     journal = {Inventiones mathematicae},
     pages = {205--214},
     publisher = {mathdoc},
     volume = {59},
     year = {1980},
     zbl = {0421.58014},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__59_142737/}
}