@article{VTAMU_2025_30_149_a1,
     author = {A. V. Greshnov},
     title = {About estimates of stability of contraction~mappings on~the~first {Heisenberg} group in the fixed point theorem},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {15--27},
     publisher = {mathdoc},
     volume = {30},
     number = {149},
     year = {2025},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2025_30_149_a1/}
}