Várhelyi, C., Makkay, F., Zsakó, J., Liptay, G., Kovács-Ludescher, K. “ON THE DIOXIMINE COMPLEXES OF TRANSITION METALS. PART XCVII. a-SUBSTITUTED OXIME DERIVATIVES IN THE SPECTROPHOTOMETRIC DETERMINATION OF COBALTl”, Periodica Polytechnica Chemical Engineering, 38(3-4), pp. 165–181, 1994.