@article{10_4064_fm990_10_2016,
     author = {Katsuya Eda and Vlasta Matijevi\'c},
     title = {Existence and uniqueness of group structures on covering spaces over groups},
     journal = {Fundamenta Mathematicae},
     pages = {241--267},
     publisher = {mathdoc},
     volume = {238},
     number = {3},
     year = {2017},
     doi = {10.4064/fm990-10-2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm990-10-2016/}
}