diff --git a/course2526/seminars/posts/ES_303.pdf b/course2526/seminars/posts/ES_303.pdf new file mode 100644 index 0000000..234f0d7 Binary files /dev/null and b/course2526/seminars/posts/ES_303.pdf differ diff --git a/course2526/seminars/slides/ES_303.pdf b/course2526/seminars/slides/ES_303.pdf new file mode 100644 index 0000000..518cbd0 Binary files /dev/null and b/course2526/seminars/slides/ES_303.pdf differ