His research, in the last years, focus mainly in the study of complex systems and random networks. More recently has been involved in studies in the following topics:
- Neuronal networks,
- Mathematical properties of multiplex networks,
- Dynamical processes on interconnected networks,
- Spreading of Diseases in Complex Networks,
- Explosive percolation.
Other topics of interest are:
- Granular media,
- Self-organized criticality,
- Non-equilibrium phase transitions,
- Deposition models.