COVID-19 AND EDUCATION MANAGEMENT: THE CASE OF SILESIAN REGION - POLAND. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, [S. l.], v. 2, p. 162–168, 2021. DOI: 10.17770/etr2021vol2.6547. Disponível em: https://archive-journals.rtu.lv/etr/article/view/4462.. Acesso em: 11 mar. 2026.