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Reliability, Safety, and Security of Railway Systems. Modelling, Analysis, Verification, and Certifi978-3-031-05814-1Series ISSN 0302-9743 Series E-ISSN 1611-3349
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0172-6625 ogy in Washington, D. C., USA in August, 1976. The choice of topic was prompted by recent advances in evolutionary ecology and the apparent suitability of insect migration and dia pause as appropriate material for evolutionary studies. In the event, that choice seems amply justified as I hope a per