Strontium-Substituted Bioactive Glass-Ceramic Films for Tissue Engineering Denisa-Alina Draghici; Alina-Andreea Mihai; Mihail-Octavian Aioanei; Nadina-Elena Negru; Adrian-Ionut Nicoara; Sorin-Ion Jinga; Dana Miu; Mihaela Bacalum; Cristina Busuioc;