Institute of Applied Mathematics, University of Freiburg (1993,1998,2001)

Department of Mathematics, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University, Prague - cooperation in 1994 - 2005 due to common Czech and Slovak research projects in science and technology

CINECA, InterUniversity Supercomputing Center, Bologna (1995,2000,2004,2005) - by European projects ICARUS, MINOS, HPC-EUROPA devoted to high-scale parallel computing

IWR, Interdisciplinary Center for Scientific Computing, University of Heidelberg (1996,2001,2003,2004,2005)

Department of Mathematics, University of Bologna (1997,1998,1999,2000)

Laboratory of Mathematics and Physics, University Paris-Sud (1997,1998)

Institute of Applied Mathematics, University of Bonn (1998,2001)

Centre Émile Borel, Institute Henri Poincaré, Paris (1998)

Department of Mathematics, Lawrence Berkeley National Laboratory, University of California, Berkeley (1998)

University of Pittsburgh and Carnegie-Mellon University, Pittsburgh (1998)

Center for Technomathematics, University of Bremen (1999)

Department of Mathematics, Universita Roma La Sapienza (2000)

WIAS - Weierstrass Institute for Applied Analysis and Stochastic, Berlin (2000,2001)

Department of Mathematics, University of Montreal (2001)

C.I.R.A.M. and DEIS, University of Bologna (2002,2004) - NATO Collaborative Linkage Grant Efficient and Robust Computational Methods for Biomedical Image Analysis

ICM, Institute of Mathematical and Computational Modelling, Warsaw University and Stefan Banach Center for Mathematics, Warsaw (2002,2003) - by European project Visual Modelling

Isaac Newton Institute for Mathematical Sciences, University of Cambridge, UK (2003) - programme Computational Chalenges in Partial Differential Equations

Department of Mathematics, Keio University, Yokohama, Japan (2004)

Department of Mathematics, Kyushu University, Fukuoka, Japan (2005)

CREA, Ecole Polytechnique, Paris, France (2005 -2009) - cooperation due to common EC projects Embryomics and BioEmergences

DEIS, University of Bologna, Italy (2005 -2009) - cooperation due to common EC projects Embryomics and BioEmergences

Department of developmental biology, CNRS, Gif sur Yvette, France (2005 -2009) - cooperation due to common EC projects Embryomics and BioEmergences

Institute Pasteur, Paris, France (2005 -2009) - cooperation due to common EC project Embryomics

Institute Curie, Paris, France (2005 -2009) - cooperation due to common EC project BioEmergences

DENALI, Brussels, Belgium (2005 -2009) - cooperation due to common EC projects Embryomics and BioEmergences

Institute for numerical and applied mathematics, University of Muenster, Germany (2008, 2009, 2010)

Jindrich Necas center for mathematical modelling, FJFI CVUT, Praha (2010)

Institute Curie, Paris, France (2011) - cooperation on Drosophila cells tracking