doc: given the limitations of the DOI methodolgy for auto generating references I opted to use a Data Sources and Methodology Section in order to display the references.

Author: surfdoc

tutorial/tutorial-cgm.ipynb

@@ -2756,7 +2756,7 @@
   {
    "cell_type": "markdown",
    "id": "1evx5r6gjru",
-   "source": "## References\n\nThis tutorial uses sample CGM data from {cite:p}`10.1371/journal.pbio.2005143.s010` and applies metrics described in {cite:p}`10.1371/journal.pbio.2005143`. The Glycemia Risk Index (GRI) calculations follow the methodology from the [Diabetes Technology Society GRI Calculator](https://www.diabetestechnology.org/gri/).",
+   "source": "**Data Sources and Methodology:**\n\nThis tutorial uses sample CGM data from the PLOS Biology supplemental dataset: <https://doi.org/10.1371/journal.pbio.2005143.s010>\n\nAnalysis methods are based on:\n- Hall, H., et al. (2018). Glucotypes reveal new patterns of glucose dysregulation. *PLOS Biology*. <https://doi.org/10.1371/journal.pbio.2005143>\n- Glycemia Risk Index methodology: <https://www.diabetestechnology.org/gri/>",
    "metadata": {}
   }
  ],