R. J. Sagala, P. F. A. Kambira, U. Gunawan, Sondang, and G. Ambarita, “Optimisation of lozenge formulation from Citronella (Cymbopogon nardus (L.) Rendle) extract with various binding materials using a simplex lattice design method”, Pharm Educ, vol. 23, no. 2, pp. p. 194–199, May 2023.