1. Ataturk University, Science Faculty, Department of Chemistry, Erzurum, Turkey
2. Erzincan University, Çayırlı Vocational School, Erzincan, Turkey
3. Aksaray University, Faculty of Arts and Science, Chemistry Department, Aksaray, Turkey
4. Ag˘rı I˙brahim Çeçen University, Science and Art Faculty, Chemistry Department, Ag˘rı, Turkey
5. Università degli Studi di Firenze, Polo Scientifico, Laboratorio di Chimica Bioinorganica, Sesto Fiorentino (Florence), Italy