BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Li, Xiaohu P Principal Yan, Rongfang P Principal Zuo, Ming J. P Principal Evaluating a warm standby system with components having proportional hazard rates <http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V8M-4TN0KRN-1&_user=10&_coverDate=01%2F31%2F2009&_rdoc=14&_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=452ff2556f8faf80f2de9ed76eaf8b4e> Volume 37, Issue 1, January 2009 pp. 56-60