1.1.3 published ._.
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1.1.9
published
._.
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1.1.11 published ._.
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1.2.3 published ._.
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._.
alternate solution
1.2.5
under revision
._.
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1.2.6 published
1.2.7 published ._.
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1.2.8
published
1.2.9
published
._.
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1.2.15 two solutions published ._.
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1.2.17
published
._.
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1.4.1 published ._.
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1.4.3 published ._.
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Last updated Sat 7 Dec 1996