@inproceedings{Prescher2021, author = {T. Prescher}, title = {Combination of formal and non-formal Learning as an Element of Development of Education Systems: Distance Learning Program "School Management" of the Technical University of Kaiserslautern in Eritrea}, booktitle = {Materials of the international Forum "Current Trends in the Concepts and Strategies of Lifelong Learning", St. Petersburg}, pages = {107 -- 112}, year = {2021}, }