1. There’s a ratfish in our cellar!;Ahlberg;Geology Today,1997
2. The present-day fauna and flora of Man as indicators of the date of the Flandrian severence;Allen,1978
3. Lower Old Red Sandstone fluvial dispersal systems in the British Isles
4. Allen T. (1904) in Notes and Documents from the Records of the Isle of Man, Application for leave to build a shelter … for dressing of flagstones, ed Moore A. W. (The Manx Sun, Douglas), p 58.