E. C. Johnson, E. I. Etim, and E. O. . Archibong, “Isolation and Anti-oxidant Potentials of Parahydroxybenzaldehyde from the Methanol Leaf Extract of Aspilia Africana (Pers.) C.D. Adams (Asteraceae)”, NIJOPHASR, vol. 6, no. 1, pp. 26–32, Mar. 2017.