diff --git a/other/materials_designer/specific_examples/Introduction.ipynb b/other/materials_designer/specific_examples/Introduction.ipynb
index 5d22f635..1e8d0022 100644
--- a/other/materials_designer/specific_examples/Introduction.ipynb
+++ b/other/materials_designer/specific_examples/Introduction.ipynb
@@ -62,7 +62,7 @@
     "\n",
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     "\n",
-    "<a id=\"ref5\"></a>[5] Giovannetti, G., et al. (2008). Substrate-induced band gap in graphene on hexagonal boron nitride. *Physical Review B*, 78(11), 115404. https://doi.org/10.1103/PhysRevB.78.115404\n",
+    "<a id=\"ref5\"></a>[5] Kang, Y.-J., Kang, J., & Chang, K. J. (2008). Electronic structure of graphene and doping effect on SiO₂. Physical Review B, 78(11), 115404. https://doi.org/10.1103/PhysRevB.78.115404\n",
     "\n",
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     "\n",
@@ -70,7 +70,7 @@
     "\n",
     "<a id=\"ref8\"></a>[8] Liu, K., et al. (2014). Evolution of interlayer coupling in twisted molybdenum disulfide bilayers. *Nature Communications*, 5, 4966. https://doi.org/10.1038/ncomms5966\n",
     "\n",
-    "<a id=\"ref9\"></a>[9] Xian, L., et al. (2020). Realization of nearly dispersionless bands with strong orbital anisotropy from destructive interference in twisted bilayer MoS₂. *Nano Letters*, 20(7), 4631-4637. https://doi.org/10.1021/acs.nanolett.9b00986\n",
+    "<a id=\"ref9\"></a>[9] Xian, L., Kennes, D. M., Tancogne-Dejean, N., Altarelli, M., & Rubio, A. (2019). Multiflat Bands and Strong Correlations in Twisted Bilayer Boron Nitride: Doping-Induced Correlated Insulator and Superconductor. Nano Letters, 19(8), 4934-4940. https://doi.org/10.1021/acs.nanolett.9b00986\n",
     "\n",
     "<a id=\"ref10\"></a>[10] Saidi, W. A., et al. (2015). Trends in the adsorption and growth morphology of metals on the MoS₂(001) surface. *Crystal Growth & Design*, 15(6), 3190-3200. https://doi.org/10.1021/cg5013395\n",
     "\n",
@@ -80,7 +80,7 @@
     "\n",
     "<a id=\"ref13\"></a>[13] Frolov, T., et al. (2013). Structural phase transformations in metallic grain boundaries. *Nature Communications*, 4, 2919. https://doi.org/10.1038/ncomms2919\n",
     "\n",
-    "<a id=\"ref14\"></a>[14] Sangiovanni, D. G., et al. (2018). Superioniclike diffusion in an elemental crystal: bcc titanium. *Physical Review B*, 97(3), 035406. https://doi.org/10.1103/PhysRevB.97.035406\n",
+    "<a id=\"ref14\"></a>[14] Sangiovanni, D. G., Mei, A. B., Edstrom, D., Hultman, L., Chirita, V., Petrov, I., & Greene, J. E. (2018). Effects of surface vibrations on interlayer mass transport: Ab initio molecular dynamics investigation of Ti adatom descent pathways and rates from TiN/TiN(001) islands. Physical Review B, 97(3), 035406. https://doi.org/10.1103/PhysRevB.97.035406\n",
     "\n",
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     "\n",