@article{TMF_2023_216_3_a2,
     author = {D. Algethami and A. I. Mudrov},
     title = {Shapovalov elements and {Hasse} diagrams},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {405--416},
     publisher = {mathdoc},
     volume = {216},
     number = {3},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2023_216_3_a2/}
}