Ryabov, P. E. Bifurcations of Liouville tori in a system of two vortices of positive intensity in a Bose-Einstein condensate. (English. Russian original) Zbl 1416.37052 Dokl. Math. 99, No. 2, 225-229 (2019); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 485, No. 6, 670-675 (2019). MSC: 37J20 37J35 37J40 70E40 70K43 PDFBibTeX XMLCite \textit{P. E. Ryabov}, Dokl. Math. 99, No. 2, 225--229 (2019; Zbl 1416.37052); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 485, No. 6, 670--675 (2019) Full Text: DOI
Plotnikov, P. I.; Kuznetsov, I. V. Kolmogorov’s theorem for low-dimensional invariant tori of Hamiltonian systems. (English. Russian original) Zbl 1252.37052 Dokl. Math. 84, No. 1, 498-501 (2011); translation from Dokl. Akad. Nauk 439, No. 3, 311-314 (2011). Reviewer: Konstantinos Efstathiou (Groningen) MSC: 37J40 PDFBibTeX XMLCite \textit{P. I. Plotnikov} and \textit{I. V. Kuznetsov}, Dokl. Math. 84, No. 1, 498--501 (2011; Zbl 1252.37052); translation from Dokl. Akad. Nauk 439, No. 3, 311--314 (2011) Full Text: DOI arXiv
Sevryuk, M. B. Invariant tori of Hamiltonian systems that are nondegenerate in Rüssmann’s sense. (English. Russian original) Zbl 0973.37035 Dokl. Math. 53, No. 1, 69-72 (1996); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 346, No. 5, 590-593 (1996). Reviewer: Simos Ichtiaroglou (Thessaloniki) MSC: 37J40 70H08 PDFBibTeX XMLCite \textit{M. B. Sevryuk}, Dokl. Math. 53, No. 1, 69--72 (1996; Zbl 0973.37035); translation from Dokl. Akad. Nauk, Ross. Akad. Nauk 346, No. 5, 590--593 (1996)