<Li> Geiger, John (2009). The Third Man Factor . Toronto: Viking Canada . ISBN 0 - 14 - 301751 - 9 . (1) </Li> <Li> "The Current for January 27, 2009 - Part 3: Third Man Factor". CBC Radio: The Current . January 27, 2009 . </Li> <Li> Messner, Reinhold (September 13, 2009). "Guardian Angels Or The' Third Man Factor'?". NPR . Retrieved 26 January 2010 . </Li> <Li> Literature DOI: 10.1016 / j. cub. 2014.09. 049 - Neurological and robot - controlled induction of an apparition - describes how the Third man factor, is produced in experiments as _́ feelings of presence _́ (FoP) - with normal persons . </Li>

Who is the third who always walks beside you