Physicochemical Investigation on the Complexes of Co(II), Ni(II) and Cu(II) with Aminocyclodiphosph(V)azane Derivative. - Abd-Ellah, I. M.; El-Sayed, B. A.; El-Nawawy, M. A.; Alaghaz, A. M. A. (Phosphorus, Sulfur & Silicon & the Related Elements, 2002)