Hounslow M. W., Hu M., Mørk A., Weitschat W., Os Vigran J., Karloukovski V., and Orchard M. J. “Intercalibration of Boreal and Tethyan Time Scales: The Magnetobiostratigraphy of the Middle Triassic and the Latest Early Triassic from Spitsbergen, Arctic Norway”. Polar Research, vol. 27, no. 3, Dec. 2008, pp. 469-90, doi:10.3402/polar.v27i3.6188.