Add sources (#69)

This adds more sources to some places where I didn't add them before.

book/references.bib

@@ -211,7 +211,7 @@
   note         = {Accessed: 2022-06-23}
 }
 
-@article{effects+temperature+flavor,
+@article{effects+temperature+flavor+wine,
   title        = {Effects of Fermentation Temperature on Key Aroma Compounds and Sensory Properties of Apple Wine},
   author       = {Bangzhu Peng et al.},
   year         = {2015},
@@ -332,4 +332,29 @@
 	title = {A wheat kernel and its nutritional value.},
 	url = {https://en.wikipedia.org/wiki/Whole_grain#/media/File:Wheat-kernel_nutrition.svg},
   note = {Accessed: 2023-03-30}
+}
+
+@article{enzymatic+activity+whole+wheat,
+	author = {Rachana Poudel},
+	title = {Enzymatic Activities and Compostional Properties of Whole Wheat Flour},
+  year = {2018},
+  page = {67},
+}
+
+@article{review+of+sourdough+starters,
+	author = {Calvert MD, Madden AA et al.},
+  title = {A review of sourdough starters: ecology, practices, and sensory quality with applications for baking and recommendations for future research},
+  year = {2021},
+  page = {3},
+	url = {https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8117929/#ref-36},
+  note = {Accessed: 2023-03-30}
+}
+
+@article{gluten+development+temperatures,
+	author = {Koga S., Böcker U. et al.},
+  title = {Influence of temperature during grain filling on gluten viscoelastic properties and gluten protein composition.},
+  year = {2015},
+  journal = {Journal of the Science of Food and Agriculture},
+	number = {96},
+	pages = {122-130}
 }