Ciprian Foias
![Ciprian Foias in Tokyo 1969](https://upload.wikimedia.org/wikipedia/commons/6/6d/Ciprian_Foias.jpg)
1
Published: 1985.
Superior document: Memoirs of the American Mathematical Society, Volume 53, Number 314
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2
Published: 2001.
Superior document: Encyclopedia of mathematics and its applications ; v. 83
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3
Published: [1989]
Superior document: Contemporary mathematics, volume 99
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