D. Liss, W.H. Owens and D.H.W. Hutton, New palaeomagnetic results from the Whin Sill complex: evidence for a multiple intrusion event and revised virtual geomagnetic poles for the late Carboniferous for the British Isles, Journal of the Geological Society; December 2004; v. 161; no. 6; p. 927–938; doi:10.1144/0016-764903-156, 2004 Geological Society of London, England