@article{10_2140_agt_2018_18_3037,
     author = {Burghelea, Dan},
     title = {A refinement of {Betti} numbers and homology in the presence of a continuous function, {II:} {The} case of an angle-valued map},
     journal = {Algebraic and Geometric Topology},
     pages = {3037--3087},
     publisher = {mathdoc},
     volume = {18},
     number = {5},
     year = {2018},
     doi = {10.2140/agt.2018.18.3037},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2018.18.3037/}
}