10 April 2013 Dear Professor Coeditor Electronic review ----------------- A revised version of the article (reference: xx0000) Test of submission system Author(s): A. Author has been submitted to Acta Crystallographica Section A and is now available from the IUCr web server for review. The author has included the following comments accompanying the revision: ---------------------------------------------------------------- The full derivation of equation (1) is now given. ---------------------------------------------------------------- You may review the revised article at https://submission.iucr.org/submit/a/review_address/qaru9cSQ3gjWEZnn/xx0000 Best wishes Managing Editor managingeditor@iucr.org ---------------------------------------------------------------------- IUCr Editorial Office, 5 Abbey Square, Chester CH1 2HU, England Phone: 44 1244 342878 WWW: https://journals.iucr.org/ ----------------------------------------------------------------------