diff --git a/doc/html/user-manual.html b/doc/html/user-manual.html
index d4d96055..373ec86d 100644
--- a/doc/html/user-manual.html
+++ b/doc/html/user-manual.html
@@ -974,14 +974,14 @@ in case a <span class="math notranslate nohighlight">\(\chi^2\)</span> single-hi
 <tr class="row-odd"><td>Bessel</td>
 <td>b</td>
 <td><span class="math notranslate nohighlight">\(\varphi (^\circ), \nu\)</span> (MHz)</td>
-<td><span class="math notranslate nohighlight">\(j_0\left(2\pi\nu t + \frac{\pi \varphi}{180}\right)\)</span></td>
+<td><span class="math notranslate nohighlight">\(J_0\left(2\pi\nu t + \frac{\pi \varphi}{180}\right)\)</span></td>
 <td>&#160;</td>
 </tr>
 <tr class="row-even"><td>internbsl</td>
 <td>ib</td>
 <td><span class="math notranslate nohighlight">\(\alpha (1), \varphi (^\circ)\)</span>, <span class="math notranslate nohighlight">\(\nu\)</span> (MHz), <span class="math notranslate nohighlight">\(\lambda_{\rm T} (\mu \mathrm{s}^{-1})\)</span>,<span class="math notranslate nohighlight">\(\lambda_{\rm L} (\mu \mathrm{s}^{-1})\)</span></td>
 <td><dl class="first last docutils">
-<dt><span class="math notranslate nohighlight">\(\alpha j_0\left(2\pi\nu t + \frac{\pi \varphi}{180}\right) \exp(-\lambda_{\rm T}t) +\)</span></dt>
+<dt><span class="math notranslate nohighlight">\(\alpha J_0\left(2\pi\nu t + \frac{\pi \varphi}{180}\right) \exp(-\lambda_{\rm T}t) +\)</span></dt>
 <dd><span class="math notranslate nohighlight">\(+ (1-\alpha) \exp(-\lambda_{\rm L} t)\)</span></dd>
 </dl>
 </td>
@@ -2916,4 +2916,4 @@ The syntax here is attribute driven</li>
   </script> 
 
 </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/src/musredit_qt5/musredit/musredit_startup.xml.in b/src/musredit_qt5/musredit/musredit_startup.xml.in
index 8372f837..2fc6373e 100644
--- a/src/musredit_qt5/musredit/musredit_startup.xml.in
+++ b/src/musredit_qt5/musredit/musredit_startup.xml.in
@@ -201,7 +201,7 @@
     <func>
       <name>bessel</name>
       <comment>(phase frequency)</comment>
-      <label>spherical Bessel 0th order</label>
+      <label>Bessel 0th order</label>
       <pixmap>bessel.png</pixmap>
       <params>2</params>
     </func>
diff --git a/src/musredit_qt6/musredit/musredit_startup.xml.in b/src/musredit_qt6/musredit/musredit_startup.xml.in
index 28d13604..9b475021 100644
--- a/src/musredit_qt6/musredit/musredit_startup.xml.in
+++ b/src/musredit_qt6/musredit/musredit_startup.xml.in
@@ -201,7 +201,7 @@
     <func>
       <name>bessel</name>
       <comment>(phase frequency)</comment>
-      <label>spherical Bessel 0th order</label>
+      <label>Bessel 0th order</label>
       <pixmap>bessel.png</pixmap>
       <params>2</params>
     </func>