Packing 10 or 11 unit squares in a square.
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Stromquist, Walter (2003)
The Electronic Journal of Combinatorics [electronic only]
Caro, Yair, Yuster, Raphael (1997)
The Electronic Journal of Combinatorics [electronic only]
Tibor Tarnai (1983)
Elemente der Mathematik
Friedman, Erich (1998)
The Electronic Journal of Combinatorics [electronic only]
Jiří Novák (1995)
Mathematica Bohemica
Let be an -set. The problem of packing of pairs on with a minimum number of quadruples on is settled for and also for , , , , , where is any positive integer. In the other cases of methods have been presented for constructing the packings having a minimum known number of quadruples.
J. Linhart, F. Österreicher (1982)
Elemente der Mathematik
N.J.A. Sloane, R.L. Graham (1990)
Discrete & computational geometry
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