@article{VMUMM_2021_6_a1,
     author = {M. Yu. Liseev},
     title = {Properties of (hereditary) normal mappings},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {7--13},
     publisher = {mathdoc},
     number = {6},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2021_6_a1/}
}