Appel, E., H. Li, A. Patzelt, and J. Wang. “Palaeomagnetic Results from Late Cretaceous and Early Tertiary Limestones from Tingri Area, Southern Tibet, China”. Journal of Nepal Geological Society, vol. 18, Dec. 1998, pp. 113–124, doi:10.3126/jngs.v18i0.32203.