6. Gagim, I. (2004). Psyhhopedagogical and Musicological Fundamentals of Musical Education. [Scientific review of the Doctor Habilitate Thesis based on works published in pedagogy]. Chişinău
7. Graneţkaia, L. (2008). Didactic Tehnologies of Interpretative Analysis of Image in Music in the Process of Piano Training of Teachers of Music. [PhD thesis]. ped. Bălţi
11. Popov, A. (1993). Differentiated Instruction in the Process of Developing’ Melodic and Rhythmic Hearing Lower School Age Students. [PhD thesis]. ped. Chişinău
12. Stici, A., Gagim I. (20013). Methodology of Musical Education. For Short-Term Higher Education Institutions Students Specialized in Music and Teaching Music. Chişinău