Effective Development of Teachers’ Skills in the Area of ICT : monograph, 16-17 October, Katowice, Poland. 1. ed. Katowice : University of Silesia, 2017. 498 s. Available on Internet: <http://weinoe.us.edu.pl/sites/weinoe.us.edu.pl/files/e-learning-9.pdf> ISBN 978-83-60071-96-0.