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The discussion on the asymptotical behaviour of the form factors in thespace-like and time-like regions have been corrected and clarified. Fig.3 hasbeen replaced by an improved analysis of the data.Comment: DFTT 13/93. LaTeX file, 11 pages + 3 figures (included

The process $$\bar p$$ p?e ? e + with polarized initial particles and proton form factors in time-like region