@article{VTPMK_2024_4_a2,
     author = {B. N. Karlov},
     title = {On decidable and undecidable theories of languages},
     journal = {Vestnik Tverskogo gosudarstvennogo universiteta. Seri\^a Prikladna\^a matematika},
     pages = {30--39},
     year = {2024},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTPMK_2024_4_a2/}
}