1. Gmelins Handbuch der Anorg. Chemie, 8 Auflage, Verlag Chemie, 1967.
2. Boldt, J. R., Jr. and Queneau, P. E. ed.: The Winning of Nickel, Longmans Canada Limited, Toronto, 1967.
3. Ullmanns Encyklopädie der Technischen Chemie, 3 Auflage Ergänzungsband, 1970, pp. 424–427.
4. AIME, Extractive Metallurgy of Copper, Nickel and Cobalt, Queneau, P. E., ed., Interscience Publishers, New York, 1961, Foreword.
5. Long, C. C., Metallurgical Transactions, Vol. 1, April 1970, pp. 753–757.