diff --git a/docs/std_iso_idmp.ipynb b/docs/std_iso_idmp.ipynb
index f29cf1a8..6764662f 100644
--- a/docs/std_iso_idmp.ipynb
+++ b/docs/std_iso_idmp.ipynb
@@ -45,6 +45,11 @@
                 "The two ISO numbers above are the main standard and technical specification guide. \n"
             ]
         },
+        {
+            "cell_type": "markdown",
+            "metadata": {},
+            "source": []
+        },
         {
             "cell_type": "markdown",
             "metadata": {},
@@ -61,7 +66,11 @@
                 "### UNICOM project\n",
                 "\n",
                 "UNICOM is a four years project (2019-2023) that generated discussions and resources for implementation of IDMP standards,\n",
-                "testing, regulatory uses of data standards, and harmonizing data formats [^6]. \n"
+                "testing, regulatory uses of data standards, and harmonizing data formats [^6]. \n",
+                "\n",
+                "### The IDMP Ontology Project Pistoia Alliance \n",
+                "\n",
+                "The IDMP Ontology project focus on implementation resources and provides digital access of IDMP standards data model [^7]<sup>,</sup>[^8].\n"
             ]
         },
         {
@@ -75,7 +84,9 @@
                 "[^3]: EMA. (year). Data on medicines (ISO IDMP standards): Overview. ([web page](https://www.ema.europa.eu/en/human-regulatory-overview/research-development/data-medicines-iso-idmp-standards-overview))\n",
                 "[^4]: EMA. (2016). Introduction to ISO Identification of Medicinal Products, SPOR programme. ([pdf](https://www.ema.europa.eu/en/documents/other/introduction-iso-identification-medicinal-products-spor-programme_en.pdf))\n",
                 "[^5]: EMA. (year). SPOR. ([web page](https://spor.ema.europa.eu/sporwi/))\n",
-                "[^6]: UNICOM. (2024). About Unicom. ([web page](https://unicom-project.eu/about/))\n"
+                "[^6]: UNICOM. (2024). About Unicom. ([web page](https://unicom-project.eu/about/))\n",
+                "[^7]: Pistoia Alliance. (2024). The IDMP Ontology. ([pdf](https://marketing.pistoiaalliance.org/hubfs/Projects-Innovation/Ontology/PA_IDMP-Ontology_Executive-Project-Summary.pdf))\n",
+                "[^8]: Pistoia Alliance. (2024). ([web page](https://spec.edmcouncil.org/idmp/ontology))"
             ]
         }
     ],