By Cleyton Richard   Ivanov Stefan   in Communications in Mathematical Physics

ISSN:0010-3616|270|1|53-67

Springer Publishing Company ‎(2007)‎

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By Davidov Johann   Ivanov Stefan   Minchev Ivan   in Quarterly Journal of Mathematics

ISSN:1464-3847|63|4|873-890

Oxford University Press‎(2012)‎

Access to resources Favorite 9.107934