1. National Institute for R&D of Isotopic and Molecular Technology, 67–103 Donat St., 400295 Cluj-Napoca, Romania
2. University of Agricultural Sciences and Veterinary Medicine, 3-5 Calea Mănăştur, 400372 Cluj-Napoca, Romania
3. INCDO-INOE 2000, Research Institute for Analytical Instrumentation, 65 Donat St., 400293 Cluj-Napoca, Romania
4. Institute of Materials Jean Rouxel, 2 rue de la Houssière, P.O. Box 32229, 44322 Nantes Cedex 3, France