diff --git a/content/zettels/continuous_transfer_functions.md b/content/zettels/continuous_transfer_functions.md
index f364223..5e0c015 100644
--- a/content/zettels/continuous_transfer_functions.md
+++ b/content/zettels/continuous_transfer_functions.md
@@ -9,3 +9,9 @@ Tags
 
 
 ## Typical Transfer Functions {#typical-transfer-functions}
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>
diff --git a/content/zettels/discrete_transfer_functions.md b/content/zettels/discrete_transfer_functions.md
index 4ee3828..a92f116 100644
--- a/content/zettels/discrete_transfer_functions.md
+++ b/content/zettels/discrete_transfer_functions.md
@@ -36,3 +36,9 @@ Tags
 
 
 ### Moving Average {#moving-average}
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>
diff --git a/content/zettels/icepap.md b/content/zettels/icepap.md
index 68383fd..0480af2 100644
--- a/content/zettels/icepap.md
+++ b/content/zettels/icepap.md
@@ -17,3 +17,9 @@ Tags
 To get the status of one axis: `5:?vstatus` (`5` is the axis index).
 
 Then, if there is some warning, to get more information, use `5:?warning`.
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>
diff --git a/content/zettels/laplace_transform.md b/content/zettels/laplace_transform.md
index 62cebdc..2e16ad2 100644
--- a/content/zettels/laplace_transform.md
+++ b/content/zettels/laplace_transform.md
@@ -34,3 +34,9 @@ Laplace transform:
 
 
 ### Electrical System {#electrical-system}
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>
diff --git a/content/zettels/materials.md b/content/zettels/materials.md
index c1bfc53..c40240f 100644
--- a/content/zettels/materials.md
+++ b/content/zettels/materials.md
@@ -10,6 +10,11 @@ Tags
 
 ## Metals {#metals}
 
+<div class="table-caption">
+  <span class="table-number">Table 1</span>:
+  Properties of common metals
+</div>
+
 | Material        | Young's Modulus (GPA) | Thermal Expansion (\\(\mu m/m/^oC\\)) | Density | Thermal Conductivity (W/mK) |
 |-----------------|-----------------------|---------------------------------------|---------|-----------------------------|
 | Aluminum        | 68                    | 23.6                                  | 2.7     | 167                         |
@@ -17,3 +22,9 @@ Tags
 | Invar           | 148                   | 1.3                                   | 8       | 10.2                        |
 | Stainless Steel | 190                   | 10.8                                  | 8       | 17                          |
 | Titanium        | 108                   | 8.6                                   | 4.5     | 16.3                        |
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>
diff --git a/content/zettels/optical_fibers.md b/content/zettels/optical_fibers.md
index 05ae5b7..40129ae 100644
--- a/content/zettels/optical_fibers.md
+++ b/content/zettels/optical_fibers.md
@@ -29,3 +29,9 @@ Otherwise, APC connectors are used.
 ## Multi-mode and Single-mode fibers {#multi-mode-and-single-mode-fibers}
 
 If laser is used (fiber interferometer for instance), a single-mode fiber should be used and the wavelength of the mode should be matched with the wavelength of the laser.
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>
diff --git a/content/zettels/optics.md b/content/zettels/optics.md
index c6cbca8..ef62984 100644
--- a/content/zettels/optics.md
+++ b/content/zettels/optics.md
@@ -6,3 +6,9 @@ draft = false
 
 Tags
 :
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>
diff --git a/content/zettels/z_transform.md b/content/zettels/z_transform.md
index ffe498a..f86a595 100644
--- a/content/zettels/z_transform.md
+++ b/content/zettels/z_transform.md
@@ -13,3 +13,9 @@ Tags
 A continuous transfer function (i.e. in the Laplace domain) can easily be converted to the discrete time domain (i.e. in the z-domain) using the `c2d` Matlab command ([doc](https://fr.mathworks.com/help/control/ref/lti.c2d.html;jsessionid=206bd0fc8950c5f8cb6b568d7393#mw_53fc4689-2099-41d0-93b3-de1e51a174c1)).
 
 Several methods can be used, each with some advantages and drawbacks, see [this document](https://fr.mathworks.com/help/control/ug/continuous-discrete-conversion-methods.html).
+
+
+## Bibliography {#bibliography}
+
+<style>.csl-entry{text-indent: -1.5em; margin-left: 1.5em;}</style><div class="csl-bib-body">
+</div>