Fix definition style

thesis.bib

@@ -1351,4 +1351,13 @@
   title     = {Practical Foundations for Programming Languages (2nd. Ed.)},
   publisher = {Cambridge University Press},
   year      = {2016}
+}
+
+# Andrej's tutorial
+@article{Bauer18,
+  author    = {Andrej Bauer},
+  title     = {What is algebraic about algebraic effects and handlers?},
+  journal   = {CoRR},
+  volume    = {abs/1807.05923},
+  year      = {2018}
 }