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LibreCat: https://research-explorer.ista.ac.at/record/4317
DOI: 10.1007/978-94-009-0435-4

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LibreCat: https://research-explorer.ista.ac.at/record/4315
DOI: 10.1038/331485a0

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LibreCat: https://research-explorer.ista.ac.at/record/4316
DOI: 10.1038/332597a0