STEINER, Maria, et al. “SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF STRONTIUM CONTAINING BIOACTIVE GLASSES”. Studia Universitatis Babeș-Bolyai Chemia, vol. 60, no. 2, June 2015, pp. 321-9, https://studia.reviste.ubbcluj.ro/index.php/chemia/article/view/8453.