diff --git a/open.ipynb b/open.ipynb
index 3303d32..4098e2d 100644
--- a/open.ipynb
+++ b/open.ipynb
@@ -5,7 +5,10 @@
    "id": "8b24f5d3",
    "metadata": {},
    "source": [
-    "# Open system"
+    "# Open system\n",
+    "\n",
+    "Reference:\n",
+    "- [Simons Institute](https://www.youtube.com/playlist?list=PLgKuh-lKre12YE_QhNAo0re5yNyApYKOC)"
    ]
   },
   {
diff --git a/simulation.ipynb b/simulation.ipynb
index 06f2b51..8bc7c48 100644
--- a/simulation.ipynb
+++ b/simulation.ipynb
@@ -41,6 +41,15 @@
    "source": [
     "## Quantum ground state simulation"
    ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Analog simulation\n",
+    "\n",
+    "[QuICS 1st workshop on Advancing Quantum Computation Beyond Gate-Model (BGM2024)](https://www.youtube.com/playlist?list=PLUz_4vZOI0H1A4V_NofenMvTJeLZGPfes)"
+   ]
   }
  ],
  "metadata": {