@article{10_4153_S0008439520000624,
     author = {Shalit, Ehud de},
     title = {Criteria for periodicity and an application to elliptic functions},
     journal = {Canadian mathematical bulletin},
     pages = {530--540},
     year = {2021},
     volume = {64},
     number = {3},
     doi = {10.4153/S0008439520000624},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439520000624/}
}