- Homogeneous polynomial vector fields of degree 2 on the 2-dimensional sphere. (0213-8743)
- Algebraic properties of the Lefschetz zeta function, periodic points and topological entropy. (0214-1493)
- A classification of braid types for periodic orbits of diffeomorphisms of surfaces of genus one with topological entropy zero. (0214-1493)
- Quadratic vector fields with a weak focus of third order. (0214-1493)
- Hoptf bifurcation from infinity for planar control systems. (0214-1493)
- Abelian integrals of quadratic Hamiltonian vector fields with an invariant straight line. (0214-1493)
- Chordal cubic systems. (0214-1493)
- Quadratic systems with a unique finite rest point. (0214-1493)
- Polynomial systems: a lower bound for the weakened 16th Hilbert problem. (0213-8743)
- Darbouxian integrability for polynomial vector fields on the 2-dimensional sphere. (0213-8743)
- Restricted three-body problems and the non-regularization of the elliptic collision restricted isosceles three-body problem. (0213-8743)
- On the number of fixed points for a continuous map of a finite connected graph. (0010-0757)