[phenixbb] on Bulk-solvent and scaling

[Pavel Afonine]

> Will you please introduce to me briefly on the function of the step of Bulk-solvent and scaling  in the Phenix refine and what is the corresponding mechanism?

Bulk-solvent and overall scaling revisited: faster calculations, 
improved results. Afonine PV, Grosse-Kunstleve RW, Adams PD, Urzhumtsev 
A. Acta Cryst. D69, 625-34 (2013).

http://journals.iucr.org/d/issues/2013/04/00/dz5273/dz5273.pdf