Dear Edgar, Thanks for your help on the export of bibliography for docx or odt. I am going to persist in trying to succeed it.
About proof.sty, really there is not the least problem from org-mode to latex, everything is smoothly exported and the final pdf document is really nice (with the really pretty smfart.class [[http://smf4.emath.fr/Publications/Formats/]] that I advice.) No, my problem is only with the export of these proof to odt, and Authorea fails also (that is the main reason why I gave up Authorea, which seems to me being a nice project, but not complete enough and therefore unfortunately useless for me). The only reasonable solutions seems to me the png export from a succeeding org export to an odt file. Best wishes, -- Joseph