Baud , A., Nakrem , H. A., Beauchamp , B., Beatty , T. W., Embry , A. F. and Henderson , C. M. (2008) “Lower Triassic bryozoan beds from Ellesmere Island, High Arctic, Canada”, Polar Research, 27(3), pp. 428-440. doi: 10.3402/polar.v27i3.6186.