DETERMINATION OF NANOGRAM AND SUB-NANOGRAM AMOUNTS OF EUROPIUM AND CERIUM BY MEANS OF CANDOLUMINESCENCE EMISSION IN THE PRESENCE OF A CO-ACTIVATOR.BELCHER R; NASSER TAK; TOWNSHEND A et al.1977; ANALYST; G.B.; DA. 1977; VOL. 102; NO 1214; PP. 382-390; BIBL. 7 REF.Article

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