The twisting index in semitoric systems
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The height invariant of a four-parameter semitoric system with two focus-focus singularities
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Journal of nonlinear science - ISSN 1432-1467-31 (2021) p.
Symplectic classification of coupled angular momenta
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Nonlinearity - ISSN 0951-7715-33:1 (2020) p. 417-468
On the symplectic invariants of semitoric systems
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Antwerp, University of Antwerp, Faculty of Science, Department of Mathematics and Computer Science, 2019,206 p.
Taylor series and twisting-index invariants of coupled spin-oscillators
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Journal of geometry and physics - ISSN 0393-0440-140 (2019) p. 131-151