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Undid revision 937815367 by Albertmath215 (talk) incorrect. uv is an edge, not a string |
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Line 78:
| pages = 37–46
| issue = 1
| doi = 10.1016/0012-365X(83)90019-5| doi-access = free}}.
*{{citation
| first = R. L. | last = Graham | authorlink = Ronald Graham
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| pages = 593–606
| year = 2002
| doi = 10.1007/s00454-002-2891-4
}}.
*{{citation
| first1 = Marcus | last1 = Schaefer | first2 = Daniel | last2 = Štefankovič
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