diff --git a/pl/v/docs/presentations.txt b/pl/v/docs/presentations.txt
new file mode 100644
index 000000000..112de937e
--- /dev/null
+++ b/pl/v/docs/presentations.txt
@@ -0,0 +1,3 @@
+2024
+YegorBugaenko - I23 - Medvednikov 0:00 of 56:41
+    https://www.youtube.com/watch?v=xMGNlUZQ-6w
diff --git a/science/math/people/nelli-litvak.txt b/science/math/people/nelli-litvak.txt
new file mode 100644
index 000000000..9b89bf97e
--- /dev/null
+++ b/science/math/people/nelli-litvak.txt
@@ -0,0 +1,5 @@
+book with Raygorodskiy
+
+2024
+YegorBugaenko - Nelli Litvak - I24 28:00 of 1:27:53
+    https://www.youtube.com/watch?v=Gp4J2dK0umU