@article{VMUMM_2017_5_a2,
     author = {T. N. Fomenko},
     title = {Brondsted order in a metric space and generalizations of {Caristi} theorem},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {21--25},
     publisher = {mathdoc},
     number = {5},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2017_5_a2/}
}