@article{10_2140_agt_2013_13_1143,
     author = {Ni, Yi},
     title = {Nonseparating spheres and twisted {Heegaard} {Floer} homology},
     journal = {Algebraic and Geometric Topology},
     pages = {1143--1159},
     year = {2013},
     volume = {13},
     number = {2},
     doi = {10.2140/agt.2013.13.1143},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2013.13.1143/}
}