Documents written, directed or translated by this author (3)
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Article : printed text
| Authors: / J.R. LAVOINE , Author / G. OSTAPTZEFF / M. OSTAPTZEFF 
Article : printed text
| Authors: / G. OSTAPTZEFF , Author / M. OSTAPTZEFF / J.R. LAVOINE 
Article : printed text
| Authors: / G. OSTAPTZEFF , Author / M. OSTAPTZEFF / J.R. LAVOINE
