D. E. A. Nasution, M. Miranti, and M. ., “Biological Test of Formulation of Subculture <i>Helicovepa armigera</i> Nuclear Polihedrosis Virus (<i>Ha</i>NPV) on Mortality of <i>Spodoptera litura</i> Larvae infested to cabbage (<i>Brassica oleracea</i> Var. capitata Linn.) Plantation”, KLS, vol. 2, no. 1, pp. 646–648, Sep. 2015.