International Journal of Mineral Processing, 1999, V 55, N 4, February.

R.A.D. Pattrick, K.E.R. England, J.M. Charnock, J.F.W. Mosselmans, Copper
activation of sphalerite and its reaction with xanthate in relation to
flotation: an X-ray absorption spectroscopy (reflection extended X-ray
absorption fine structure) investigation, 
pp. 247-265

R. Bürger, M.C. Bustos, F. Concha, Settling velocities of particulate
systems: 9. Phenomenological theory of sedimentation processes: numerical
simulation of the transient behaviour of flocculated suspensions in an
ideal batch or continuous thickener, 
pp. 267-282

N.P. Finkelstein, Addendum to: The activation of sulphide minerals for
flotation: a review, 
pp. 283-286