diff --git a/nontech/psycho/lections/petuhov.txt b/nontech/psycho/lections/petuhov.txt
index 3d75d0558..2eaa44c69 100644
--- a/nontech/psycho/lections/petuhov.txt
+++ b/nontech/psycho/lections/petuhov.txt
@@ -30,3 +30,7 @@ Psy - MSU - Petuhov - General Psychology of p54
 2004
 Psy - Common Psychology of p54
     https://www.youtube.com/playlist?list=PLt3fgqeygGTVk5khY228EBHujarUgyLfv
+    p1 - Psy and Phil of 2:25:09
+        https://www.youtube.com/watch?v=zWCKjoo6hNI
+        ! 4:00 - Claude Levi-Stross - Polozhenie Myph-Zagadka nado perevernut
+        !        Drevniy text - eto nekiy otvet na tot vopros, kotoryi my poka eschyo sebe ne zadali
diff --git a/pl/cpp/docs/books/ds-algo.txt b/pl/cpp/docs/books/ds-algo.txt
index 415358d1f..221ebd8f9 100644
--- a/pl/cpp/docs/books/ds-algo.txt
+++ b/pl/cpp/docs/books/ds-algo.txt
@@ -1,3 +1,9 @@
+2020
+Kedyk - Implementing Useful Altorithms in Cpp
+    98442EC18CAFE0694F80E97E83A7B04C
+    5CB189FB7240C2A5BE0190975678F62E
+    3543F7792011418B39DDCE114E0C8B72
+    ! ru is also avail
 2011
 Goodrich - Data Structures and Algorithms in Cpp 2nd ed ru
     9610F5551AB358D6388A606DF58BE3FA