https://link.springer.com/chapter/10.1007/3-540-46020-9_5?error=cookies_not_supported&code=64abfa44-d0a9-4d69-8ebf-b1324666dcb6

https://link.springer.com/chapter/10.1007/3-540-46020-9_5?error=cookies_not_supported&code=64abfa44-d0a9-4d69-8ebf-b1324666dcb6

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