1. Baeten, M., Dochy, F., Struyven, K., Parmentier, E., & Vanderbruggen, A. (2016). Student-centered learning environments: An investigation into student teachers ’instructional preferences and approaches to learning. Learning Environments Research, 19(1), 43–62.
2. Barrows, H. S., & Barrows. (1988). The tutorial process (2nd Ed.). Southern Illinois University, School of Medicine.
3. Biggs, J. B., & Tang, C. (2007). Teaching for quality learning at university (3rd ed.). McGraw Hill Education & Open University Press.
4. Biggs, J., & Tang, C. (2011). Teaching for quality learning at university. SRHE.
5. Chye, S. H., Neo, W. K., & Chyn, K. Y. (2008). From sage-on-the-stage to guide-by-the-side: Effective tutor skills in problem-based learning. Temasek Business School available online in English on the page http://www.ntu.edu.vn/Portals/96/Tu%20lieu%20tham%20khao/Phuong%20phap%20giang%20day/role%20of%20tutor%20in%20pbl.pdf and offered to students translated in Romanian.