Geochemistry, Geophysics, Geosystems 4 (3): 1027. doi:10.1029/2001GC000252. http://peterbird.name/publications/2003_PB2002/2003_PB2002.htm. ↑ Timothy M. Kusky; Erkan Toraman & Tsilavo Raharimahefa (2006-11-20).