Mckay's observation and vertex operator algebras generated by two conformal vectors of central charge 1/2 Ching Hung Lam, Ching Hung Lam Search for other works by this author on: Oxford Academic Google Scholar Hiromichi Yamada, Hiromichi Yamada Search for other works by this author on: Oxford Academic Google Scholar Hiroshi Yamauchi Hiroshi Yamauchi Search for other works by this author on: Oxford Academic Google Scholar International Mathematics Research Papers, Volume 2005, Issue 3, 2005, Pages 117–181, https://doi.org/10.1155/IMRP.2005.117 Published: 01 March 2005 Article history Published: 01 March 2005 Received: 16 March 2005 Accepted: 26 June 2005