@article{10_2140_agt_2023_23_3205,
     author = {Neofytidis, Christoforos},
     title = {On a problem of {Hopf} for circle bundles over aspherical manifolds with hyperbolic fundamental groups},
     journal = {Algebraic and Geometric Topology},
     pages = {3205--3220},
     publisher = {mathdoc},
     volume = {23},
     number = {7},
     year = {2023},
     doi = {10.2140/agt.2023.23.3205},
     url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2023.23.3205/}
}