N. A. Hovhannisyan, M. B. Chitchyan, X. Y. Qing, G. G. Oganezova, M. A. Melkumyan, and H. Y. Sahakyan, “EFFECT OF $ppc$ AND $dapA$ DOSAGE INCREASE ON LYSINE PRODUCTION IN $BREVIBACTER1UM~LACTOFERMENTUM$”, Proc. YSU B: Chem. Biol. Sci., vol. 38, no. 1 (203), pp. 99–104, Dec. 2003.