diff --git a/course2526/seminars/posts/ES_306.pdf b/course2526/seminars/posts/ES_306.pdf
new file mode 100644
index 0000000..bf9ce06
Binary files /dev/null and b/course2526/seminars/posts/ES_306.pdf differ
diff --git a/course2526/seminars/slides/ES_306.pdf b/course2526/seminars/slides/ES_306.pdf
new file mode 100644
index 0000000..ff45f7f
Binary files /dev/null and b/course2526/seminars/slides/ES_306.pdf differ