Bibliography

[Cu1]

R. Curtis, ``The Steiner system $S(5,6,12)$, the Mathieu group $M_{12}$, and the kitten,'' in Computational group theory, ed. M. Atkinson, Academic Press, 1984.

[Cu2]

---, ``A new combinatorial approach to $M_{24}$,'' Math Proc Camb Phil Soc 79(1976)25-42

[Co1]

J. Conway, ``Hexacode and tetracode - MINIMOG and MOG,'' in Computational group theory, ed. M. Atkinson, Academic Press, 1984.

[Co2]

---, On numbers and games (ONAG), Academic Press, 1976.

[CS1]

J. Conway and N. Sloane, Sphere packings, Lattices and groups, 3rd ed., Springer-Verlag, 1999.

[CS2]

---, ``Lexicographic codes: error-correcting codes from game theory,'' IEEE Trans. Infor. Theory32(1986)337-348.

[KR]

J. Kahane and A. Ryba, ``The hexad game,'' Electronic Journal of Combinatorics, 8 (2001)