Aleksander, Zdzisław. „The Concept of teachers’ Learning in the Field of Early Education. From the Freinet Pedagogy to the Training of Academic Teachers”. Problemy Wczesnej Edukacji, t. 25, nr 2, czerwiec 2014, s. 101-6, https://czasopisma.bg.ug.edu.pl/index.php/pwe/article/view/886.