1ο Newsletter
https://esen.ios.edu.pl/images/Newsletter/1st_Newsletter_GR.pdf
2ο Newsletter
https://esen.ios.edu.pl/images/Newsletter/2nd_Newsletter_GR.pdf
3ο Newsletter
https://esen.ios.edu.pl/images/Newsletter/3rd_Newsletter_GR.pdf
4ο Newsletter
https://esen.ios.edu.pl/images/Newsletter/4th_Newsletter_GR.pdf
5ο Newsletter
https://esen.ios.edu.pl/images/Newsletter/5th_Newsletter_GR.pdf