@article{10_2140_agt_2017_17_1871,
     author = {Hatcher, Allen and Vogtmann, Karen},
     title = {Tethers and homology stability for surfaces},
     journal = {Algebraic and Geometric Topology},
     pages = {1871--1916},
     year = {2017},
     volume = {17},
     number = {3},
     doi = {10.2140/agt.2017.17.1871},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2017.17.1871/}
}