add threes reference. closes #7
author Gabriele Cirulli
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committer Gabriele Cirulli
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commit bc2a710ea9c2348394550a919670b751e55c6080
tree 25aad277a42fc672d92908b54e215a9d38579678
parent 5a49a0ef91217f3e03299972ef363e456ddd9d1b
add threes reference. closes #7
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