https://martijnouwehand.weblog.tudelft.nl/tag/karel-luyben/
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https://www.luybendilday.com/
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https://research.tudelft.nl/en/publications/fixing-flow-rates-in-recycle-systems-luybens-rule-revisited/
Fixing flow rates in recycle systems: Luyben's rule revisited - TU Delft Research Portal