@article{10_2140_agt_2016_16_1279,
     author = {Schirmer, Trenton},
     title = {A lower bound on tunnel number degeneration},
     journal = {Algebraic and Geometric Topology},
     pages = {1279--1308},
     year = {2016},
     volume = {16},
     number = {3},
     doi = {10.2140/agt.2016.16.1279},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2016.16.1279/}
}