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Documents disponibles dans cette catégorie (6)
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chapter
| 1995 Authors: / Toma TOMOV , Author / Nikola ATANASSOV , Author 
Article : printed text
| Authors: / Vessela BANOVA , Author 
chapter
| 1993 Authors: / Gilbert DIATKINE , Author / Alain GIBEAULT / Monique GIBEAULT / Michel VINCENT 
chapter
| 2011 Authors: / Ventzislav VATOV , Author 
Article : printed text
| Authors: / Sabine PARMENTIER , Author 
Article : printed text
| Authors: / Dessislava GADEVA , Author / Ventzislav VATOV
