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41
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42
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43
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44
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45
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46
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47
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48
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49
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50Опубликовано 1982“...Bulg. acad. of sciences...”
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51
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52
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53Опубликовано 1983“...Ed. Acad. RSR...”
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54
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55по Kogălniceanu, Mihail, Simonescu, Dan and Penelea, Georgeta“...Acad. R.S.R...”
Опубликовано 1984
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56Опубликовано 1986“...Ed. Acad. RSR...”
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57
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58Опубликовано 1987“...Ed. Acad. RSR...”
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59Опубликовано 1987“...Ed. Acad. RSR...”
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60Опубликовано 1987“...Ed. Acad. RSR...”