1. ICUB/Faculty of Mathematics and Computer Science, University of Bucharest, 14 Academiei St. District 1, 010014, Bucharest
2. National Institute of Research and, Development for Biological Sciences, 296 Independenţei Bd. District 6, 060031, Bucharest
3. Faculty of Mathematics and Computer Science, University of Bucharest, 14 Academiei St. District 1, 010014, Bucharest