Jassim, L. S. “Synthesis and Characterization of Complexes of New Derivative of Cyclopentaphenanthren-3-One With Manganese (II), Iron (II), Cobalt (II), Nickel (II), and Copper (II) Ions”. Engineering and Technology Journal, vol. 38, no. 3B, Dec. 2020, pp. 197-03, doi:10.30684/etj.v38i3B.681.