@article{10_2140_agt_2014_14_115,
     author = {Habiro, Kazuo and Widmer, Tamara},
     title = {On {Kirby} calculus for null-homotopic framed links in 3{\textendash}manifolds},
     journal = {Algebraic and Geometric Topology},
     pages = {115--134},
     year = {2014},
     volume = {14},
     number = {1},
     doi = {10.2140/agt.2014.14.115},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2014.14.115/}
}