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Experimental Investigation of High-Energy Photon Splitting in Atomic FieldsAkhmadaliev, Sh. Zh.; Kezerashvili, G. Ya.; Klimenko, S. G.; Lee, R. N.; Malyshev, V. M.; Maslennikov, A. L.; Milov, A. M.; Milstein, A. I.; Muchnoi, N. Yu.; Naumenkov, A. I.; Panin, V. S.; Peleganchuk, S. V.; Pospelov, G. E.; Protopopov, I. Ya.; Romanov, L. V.; Shamov, A. G.; Shatilov, D. N.; Simonov, E. A.; Strakhovenko, V. M.; Tikhonov, Yu. A. · Physical Review Letters · 2002