@article{MABA_2004_18_1-2_a23,
     author = {Svetlana Topalova},
     title = {STS(21) with {Automorphisms} of {Order} 3 with 3 {Fixed} {Points} and 7 {Fixed} {Blocks}},
     journal = {Mathematica balkanica},
     pages = {215},
     publisher = {mathdoc},
     volume = {18},
     number = {1-2},
     year = {2004},
     url = {http://geodesic.mathdoc.fr/item/MABA_2004_18_1-2_a23/}
}