Geodesic
New Symmetric (61,16,4) Designs Invariant Under the Dihedral Group of Order 10
Serdica Mathematical Journal, Tome 24 (1998) no. 2, pp. 179-186.

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In this note we construct five new symmetric 2-(61,16,4) designs invariant under the dihedral group of order 10. As a by-product we obtain 25 new residual 2-(45,12,4) designs. The automorphism groups of all new designs are computed.
Keywords: Symmetric Design, Residual Design, Automorphism Group of a Design, Self-Dual Code 
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     author = {Landjev, Ivan and Topalova, Svetlana},
     title = {New {Symmetric} (61,16,4) {Designs} {Invariant} {Under} the {Dihedral} {Group} of {Order} 10},
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Landjev, Ivan; Topalova, Svetlana. New Symmetric (61,16,4) Designs Invariant Under the Dihedral Group of Order 10. Serdica Mathematical Journal, Tome 24 (1998) no. 2, pp. 179-186. http://geodesic.mathdoc.fr/item/SMJ2_1998_24_2_a4/