@article{10_4153_S0008439523000371,
     author = {Asipchuk, Oleg and Drezels, Vladyslav},
     title = {Examples of exponential bases on union of intervals},
     journal = {Canadian mathematical bulletin},
     pages = {1296--1312},
     year = {2023},
     volume = {66},
     number = {4},
     doi = {10.4153/S0008439523000371},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439523000371/}
}