@article{ZNSL_1989_175_a2,
     author = {B. B. Venkov and D. M. Ivanov},
     title = {Combinatorial properties of extremal, doubly even codes of length 48},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {24--29},
     publisher = {mathdoc},
     volume = {175},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1989_175_a2/}
}