Sharkov, E. V.; Bortnikov, N. S.; Bogatikov, O. A.; Belyatskii, B. V.; Zinger, T. F.; Skolotnev, S. G. (2004): Mesozoic zircon from gabbronorites of the axial Mid-Atlantic Ridge, 6 degrees N, Markov Deep. MAIK Nauka/Interperiodika, Moscow, Russian Federation, Doklady Earth Sciences, 397 (5), 654-657, georefid:2007-033992