Development of Professional Competence of Teachers as A Factor of The Education Quality Management in Preschool InstitutionsLydia Shnejder, Marina Khmelkova, Tatyana Golovyatenko, Maria Poliakova and Oksana DoroshenkoSHS Web Conf., 79 (2020) 04001DOI: https://doi.org/10.1051/shsconf/20207904001