@article{10_2298_FIL2204171O,
     author = {Daniele Ettore Otera},
     title = {Double points and universal covers},
     journal = {Filomat},
     pages = {1171 },
     year = {2022},
     volume = {36},
     number = {4},
     doi = {10.2298/FIL2204171O},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2204171O/}
}