TY  - RPRT
TI  - Phase combination and cross validation in iterated density-modification calculations.
AU  - K D Cowtan
AU  - P Main
PY  - 1996
DO  - 10.1107/s090744499500761x
UR  - https://pubmed.ncbi.nlm.nih.gov/15299724/
ID  - 15299724
ER  -