@article{ZNSL_2001_279_a2,
     author = {V. N. Berestovskii and V. M. Gichev},
     title = {Metrized semigroups},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {24--60},
     publisher = {mathdoc},
     volume = {279},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2001_279_a2/}
}