@article{10_4153_S000843952000096X,
     author = {Ivanov, Grigory},
     title = {Tight frames and related geometric problems},
     journal = {Canadian mathematical bulletin},
     pages = {942--963},
     year = {2021},
     volume = {64},
     number = {4},
     doi = {10.4153/S000843952000096X},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S000843952000096X/}
}