1. Department for Safety of Mineral Resources, National Institute for Research & Development in Mine Safety and Protection to Explosion - INSEMEX, Petroșani, Romania
2. Faculty of Chemistry and Chemical Engineering, Babeș-Bolyai University, Cluj-Napoca, Romania
3. ICSI Analytics, National Research and Development Institute for Cryogenic and Isotopic Technologies, Râmnicu-Vâlcea, Romania