TY  - RPRT
TI  - Density modification for macromolecular phase improvement.
AU  - K D Cowtan
AU  - K Y Zhang
PY  - 1999
DO  - 10.1016/s0079-6107(99)00008-5
UR  - https://pubmed.ncbi.nlm.nih.gov/10581970/
ID  - 10581970
ER  -