1. Institute of Applied Physics, Moldova State University, 5 Academiei Str., MD2028 Chisinau, Republic of Moldova
2. Institute of Chemistry, Moldova State University, 3 Academiei Str., MD2028 Chisinau, Republic of Moldova
3. Research Center for Thermal Analysis in Environmental Issues, West University of Timisoara, 4, b-dul V. Parvan, 300223 Timisoara, Romania