diff --git a/files/paper1.pdf b/files/paper1.pdf new file mode 100644 index 0000000000000..7ce878fe931d4 Binary files /dev/null and b/files/paper1.pdf differ diff --git a/files/paper2.pdf b/files/paper2.pdf new file mode 100644 index 0000000000000..c583836d56906 Binary files /dev/null and b/files/paper2.pdf differ diff --git a/files/paper3.pdf b/files/paper3.pdf new file mode 100644 index 0000000000000..9503e9ea12d5d Binary files /dev/null and b/files/paper3.pdf differ