@article{10_2140_agt_2018_18_2131,
     author = {Sparks, Peter},
     title = {The double n{\textendash}space property for contractible n{\textendash}manifolds},
     journal = {Algebraic and Geometric Topology},
     pages = {2131--2149},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2018},
     doi = {10.2140/agt.2018.18.2131},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2018.18.2131/}
}