diff --git a/elements/debian-minimal/README.rst b/elements/debian-minimal/README.rst
index 4e3ef26e..04f1fbde 100644
--- a/elements/debian-minimal/README.rst
+++ b/elements/debian-minimal/README.rst
@@ -60,6 +60,10 @@ pass extra arguments to the debootstrap command used to create the
 base filesystem image. If --keyring is is used in `DIB_DEBOOTSTRAP_EXTRA_ARGS`,
 it will override `DIB_APT_KEYRING` if that is used as well.
 
+For further information about `DIB_DEBIAN_DEBOOTSTRAP_SCRIPT` ,
+`DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE` and `DIB_DEBOOTSTRAP_EXTRA_ARGS`
+please consult "README.rst" of the debootstrap element.
+
 -------------------
 Note on ARM systems
 -------------------
diff --git a/elements/debian/README.rst b/elements/debian/README.rst
index d079f398..08090e43 100644
--- a/elements/debian/README.rst
+++ b/elements/debian/README.rst
@@ -28,6 +28,10 @@ pass extra arguments to the debootstrap command used to create the
 base filesystem image. If --keyring is is used in `DIB_DEBOOTSTRAP_EXTRA_ARGS`,
 it will override `DIB_APT_KEYRING` if that is used as well.
 
+For further information about `DIB_DEBIAN_DEBOOTSTRAP_SCRIPT` ,
+`DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE` and `DIB_DEBOOTSTRAP_EXTRA_ARGS`
+please consult "README.rst" of the debootstrap element.
+
 -------------------
 Note on ARM systems
 -------------------
diff --git a/elements/debootstrap/README.rst b/elements/debootstrap/README.rst
index 9e61306e..108f52e1 100644
--- a/elements/debootstrap/README.rst
+++ b/elements/debootstrap/README.rst
@@ -18,7 +18,9 @@ and Fedora.
 
 The `DIB_OFFLINE` or more specific `DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE`
 variables can be set to prefer the use of a pre-cached root filesystem
-tarball.
+tarball. Setting `DIB_OFFLINE` may cause other element to use cached data,
+while `DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE` only functions in the debootstrap
+element.
 
 The `DIB_DEBOOTSTRAP_EXTRA_ARGS` environment variable may be used to
 pass extra arguments to the debootstrap command used to create the
diff --git a/elements/ubuntu-minimal/README.rst b/elements/ubuntu-minimal/README.rst
index dd0bf624..23764a45 100644
--- a/elements/ubuntu-minimal/README.rst
+++ b/elements/ubuntu-minimal/README.rst
@@ -26,3 +26,7 @@ The `DIB_DEBOOTSTRAP_EXTRA_ARGS` environment variable may be used to
 pass extra arguments to the debootstrap command used to create the
 base filesystem image. If --keyring is is used in `DIB_DEBOOTSTRAP_EXTRA_ARGS`,
 it will override `DIB_APT_KEYRING` if that is used as well.
+
+For further information about `DIB_DEBIAN_DEBOOTSTRAP_SCRIPT`,
+`DIB_DEBIAN_USE_DEBOOTSTRAP_CACHE` and `DIB_DEBOOTSTRAP_EXTRA_ARGS`
+please consult "README.rst" of the debootstrap element.