BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Applegate, David L. P Principal Bixby, Robert E. P Principal Chvátal, Vašek P Principal Cook, William P Principal Espinoza, Daniel G. P Principal Goycoolea, Marcos P Principal Helsgaun, Keld P Principal Certification of an optimal TSP tour through 85,900 cities <http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V8M-4TP49J4-1&_user=10&_coverDate=01%2F31%2F2009&_rdoc=4&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235874%232009%23999629998%23797139%23FLA%23display%23Volume)&_cdi=5874&_sort=d&_docanchor=&_ct=18&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=0070a724b1e9fd3fe99db440c0102d91> Volume 37, Issue 1, January 2009 pp. Volume 37, Issue 1, January 2009