@article{MZM_2024_116_4_a5,
     author = {T. G. Pshenitsyn},
     title = {Closure ordinal of immediate derivability operator of infinitary action logic},
     journal = {Matemati\v{c}eskie zametki},
     pages = {559--577},
     year = {2024},
     volume = {116},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2024_116_4_a5/}
}