diff --git a/resen/petri/index.html b/resen/petri/index.html
index 4668626..3b82144 100644
--- a/resen/petri/index.html
+++ b/resen/petri/index.html
@@ -137,9 +137,6 @@
 
     <textarea id="poem" autocomplete="off" readonly rows="15" spellcheck="false"></textarea>
 
-    <p>
-        העבודה נוצרה עבור  <a href="https://oulipoh.com/resen/#0">רֶסֶן אפס</a>.
-    </p>
     <div class="refs">
         <blockquote>Susan Stepney, <a href="https://susan-stepney.blogspot.com/2012/12/ode-to-petri-net.html">ODE to a Petri net</a> (2012).</blockquote>
         <blockquote>Owen Lynch, <a href="https://owenlynch.org/posts/2019-12-13-petri-nets-in-action/">Petri Nets in Action</a> (2019).</blockquote>
diff --git a/resen/petri/style.css b/resen/petri/style.css
index 78317ef..1e4d39a 100644
--- a/resen/petri/style.css
+++ b/resen/petri/style.css
@@ -101,6 +101,7 @@
 }
 
 #poem {
+    border: none;
     box-sizing: border-box;
     line-height: 2;
     margin-block: 3em;