diff --git a/README.adoc b/README.adoc
index 3db0a563..0998898f 100644
--- a/README.adoc
+++ b/README.adoc
@@ -6308,7 +6308,10 @@ Sources:
 * link:kernel_modules/procfs.c[]
 * link:rootfs_overlay/lkmc/procfs.sh[]
 
-Bibliography: https://stackoverflow.com/questions/8516021/proc-create-example-for-kernel-module/18924359#18924359
+Bibliography:
+
+* https://superuser.com/questions/619955/how-does-proc-work/1442571#1442571
+* https://stackoverflow.com/questions/8516021/proc-create-example-for-kernel-module/18924359#18924359
 
 ===== /proc/version
 
@@ -6352,8 +6355,9 @@ Sources:
 
 Vs procfs:
 
-* https://unix.stackexchange.com/questions/4884/what-is-the-difference-between-procfs-and-sysfs
+* https://unix.stackexchange.com/questions/4884/what-is-the-difference-between-procfs-and-sysfs/382315#382315
 * https://stackoverflow.com/questions/37237835/how-to-attach-file-operations-to-sysfs-attribute-in-platform-driver
+* https://serverfault.com/questions/65261/linux-proc-sys-kernel-vs-sys-kernel
 
 You basically can only do `open`, `close`, `read`, `write`, and `lseek` on sysfs files.