Triassic gas resources of the Western Canada sedimentary basin,interior plains / T.D.Bird,J.E.Barclay,R.I.Campbell и др., 1994. - 96 p. - Текст : непосредственный.
Information security and cryptology - ICISC 2008 : 11th international conference, Seoul, Korea, December 3-5, 2008: revised selected papers / ed. P.J. Lee [et al.], 2009 r=on-line. - Текст : электронный.
Devonian gas resources of the Western Canada sedimentary basin / G.E.Reinson,P.J.Lee,W.Warters и др., 1993. - 157 p. - Текст : непосредственный.