The measurement of the Se/S ratios in sulphide minerals and their ...
... sg10 : D2 z + Y2 d ? 2YdYu + Y2 u = 0. (31) sg11(Xu, Yu, Xd, Yd, Dz, c) = 0. (32) sg12(Xu, Yu, Xd, Yd, Dz, c) = 0. (33) and the input singularities are given ... 
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