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@article{MAT_1968_12_6_a7, author = {Ch. C. Pugh}, title = {An {Improved} closing lemma and a general density theorem}, journal = {Matematika}, pages = {136--146}, publisher = {mathdoc}, volume = {12}, number = {6}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1968_12_6_a7/} }
Ch. C. Pugh. An Improved closing lemma and a general density theorem. Matematika, Tome 12 (1968) no. 6, pp. 136-146. http://geodesic.mathdoc.fr/item/MAT_1968_12_6_a7/