Working as a referee for journals
Mathematische Annalen
American Journal of Mathematics
The Royal Society of Edinburgh, Proceedigns Section A - Mathematics
Indiana University Mathematical Journal
Geometria Dedicata
Communications in Analysis and Geometry
Differential Geometry and its Applications
Journal of Geometry and Physics
Annals of Global Analysis and Geometry
Journal of Geometry
Glasgow Mathematical Journal
Soochow Journal of Mathematics
Divulgaciones Matematicas
The Conference Contemporary Geometry and Related Topics, Belgrade, 2005
Turkish Journal of Mathematics
Il Nuovo Cimento B
Acta Mathematica Universitatis Comenianae
International Journal of Open Problems in Computes Science and Mathematics
Journal of Advanced Research in Pure Mathematics
Idian Journal of Pure and Applied Mathematics
Journal of the European Mathematical Society
Nonlinear Analysis Series A: Theory, Methods & Applications
Mathematical Reviews
Zentralblatt für Mathematik
and so on...