Published in Scopus, in 1978, in volume 1, pages 114-131
Published in Scopus, in 1978, in volume 1, pages 132-141
Published in Scopus, in 1978, in volume 1, pages 141-142
Published in Scopus, in 1978, in volume 2, pages 1-7
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Published in Scopus, in 1978, in volume 2, pages 11-17
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Published in Scopus, in 1978, in volume 2, pages 63-71
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Published in Scopus, in 1978, in volume 2, pages 102-103