@article{AFST_2015_6_24_5_1079_0,
     author = {Agol, Ian and Freedman, Michael},
     title = {Simplifying $3$-manifolds in ${\mathbb{R}}^4$},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {1079--1101},
     publisher = {Universit\'e Paul Sabatier, Institut de math\'ematiques},
     address = {Toulouse},
     volume = {Ser. 6, 24},
     number = {5},
     year = {2015},
     doi = {10.5802/afst.1476},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/afst.1476/}
}