1. V. Lawson, A.N. Kerr, Y. Shields, P.E. Wells, M. Xu and Z. Dai, “Improving Pentlandite Pyrrhotite Separation at Inco's Clarabelle Mill”, Centenary of Flotation Symposium, 2005, Ed. G.J. Jameson, Brisbane, Australia, pp. 875–885.
2. M. Xu, P. Quinn, G. Robertson and S. Wilson, “Development of a Two-stage Middlings Circuit at Inco's Clarabelle Mill Part 1: Laboratory Studies”, Proceedings of the 32nd Annual Meeting of the Canadian Mineral Processors, Ottawa, 2000, pp. 349–361.