@article{SMJ2_1999_25_3_a0,
     author = {Buyuklieva, Stefka},
     title = {New {Binary} {Extremal} {Self-Dual} {Codes} of {Lengths} 50 and 52},
     journal = {Serdica Mathematical Journal},
     pages = {185--190},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_1999_25_3_a0/}
}