M. Ahmad, I. Md Isa, and M. I. Saleh, “Penentuan Pemalar-Pemalar Kestabilan Kompleks-Kompleks Lantanida La(III), Pr(III), Eu(III), Ga(III), Er(III) dan Lu(III) dengan Terbitan-Terbitan Berfluorin 1-Fenil-3-Metil-4-Benzoil-5-Pirazolona (HPMBP) dengan menggunakan Kaedah Pentitratan: Determination of the Stability Constants of the Complexes of Lantanides La(III), Pr(III), Eu(III), Ga(III), Er(III) and Lu(III) with Fluorinated Derivatives of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (HPMBP) by Using Titration Method”, JSML, vol. 3, no. 2, pp. 1–10, Jan. 2019.