@article{UFA_2022_14_2_a6,
     author = {S. G. Haliullin},
     title = {Ultraproducts of quantum mechanical systems},
     journal = {Ufa mathematical journal},
     pages = {90--96},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {2022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2022_14_2_a6/}
}