@article{DAN_1971_199_5_a3,
     author = {Van Ny Kyong},
     title = {Pseudoisotopy of the three-dimensional sphere $S^3$},
     journal = {Doklady Akademii Nauk},
     pages = {1002--1003},
     publisher = {mathdoc},
     volume = {199},
     number = {5},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_199_5_a3/}
}