|
Universidad de Salamanca
|
University
|
Spain |
18
|
|
Ioffe Institute
|
Research Centre
|
Russia |
15
|
|
University of Groningen
|
University
|
Netherlands |
12
|
|
Universidad Politécnica de Madrid
|
University
|
Spain |
11
|
|
Universidade Federal de Alagoas
|
University
|
Brazil |
5
|
|
Saint Petersburg State University
|
University
|
Russia |
4
|
|
Instituto de Física Fundamental
|
Research Centre
|
Spain |
3
|
|
Massachusetts Institute of Technology
|
University
|
United States |
3
|
|
Pierre and Marie Curie University
|
University
|
France |
2
|
|
University of Warsaw
|
University
|
Poland |
2
|
|
Universidad Autónoma de Madrid
|
University
|
Spain |
1
|
|
Universidad Politécnica de Valencia
|
University
|
Spain |
1
|
|
Centre National de la Recherche Scientifique
|
Research Centre
|
France |
1
|
|
Lund University
|
University
|
Sweden |
1
|
|
Vienna University of Technology
|
University
|
Austria |
1
|
|
University of Ulm
|
University
|
Germany |
1
|
|
University of Wisconsin–Madison
|
University
|
United States |
1
|
|
Max Planck Institute of Quantum Optics
|
Research Centre
|
Germany |
1
|
|
State Optical Institute named after SI Vavilov
|
Research Centre
|
Russia |
1
|
|
Scuola Normale Superiore di Pisa
|
University
|
Italy |
1
|
