XU (X for "unknown"and U for "undercover agent") was a clandestine intelligence organisation working on behalf of Allied powers in occupied Norway during World War II. Though its work proved invaluable for operations against German operations in Norway, most of its operations, organization, etc.

Neutrino masses in SU(2)xU(1) theories
Cancer statistics. Ca Cancer J Clin
Potent and specific genetic interference by double-stranded RNA in Caenorhabditis elegans.
Potent and specific genetic interference by double-stranded RNA in Caenorhabditis elegans
A density-based algorithm for discovering clusters a density-based algorithm for discovering clusters in large spatial databases wit...
The internet of things: a survey
Cancer statistics, 2009.
Cancer statistics, 2006.
Presence of simian virus 40 DNA sequences in human lymphomas
Chemistry – An Asian Journal