Michael Charles
![Press Picture 2021](https://upload.wikimedia.org/wikipedia/commons/9/9b/Press_Picture_2021.jpg)
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Published: 2011.
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Published: [1986]
Superior document: Contemporary mathematics, volume 50
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Published: [2021]
Superior document: Title is part of eBook package: De Gruyter EBOOK PACKAGE COMPLETE 2021 English
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