diff --git a/bib/bug405181-attachment118754-two-chapters-duplicate.bib b/bib/bug405181-attachment118754-two-chapters-duplicate.bib
new file mode 100644
index 0000000..52c6760
--- /dev/null
+++ b/bib/bug405181-attachment118754-two-chapters-duplicate.bib
@@ -0,0 +1,57 @@
+@inbook{Giddens1974,
+	author = {Giddens, Anthony},
+	booktitle = {Elites and power in British society},
+	chapter = {Elites in the British Class Structure},
+	editor = {Stanworth, Philip and Giddens, Anthony},
+	owner = {vicente},
+	pages = {22--44},
+	publisher = {London, New York: Cambridge University Press},
+	timestamp = {2010.02.15},
+	year = {1974}
+}
+
+@inbook{Joignant2011,
+	author = {Joignant, Alfredo},
+	booktitle = {Notables tecn{\'o}cratas y Madarines. Elementos de sociolog\'{\i}a de las elites en Chile (1990-2010)},
+	chapter = {Tecn{\'o}cratas, Technopols y dirigentes de partido: tipos de agentes y especies de capital en las elites gubernamentales de la Concertaci{\'o}n (1990-2010)},
+	editor = {Joignant, Alfredo and G{\"u}ell, Pedro},
+	owner = {vicente},
+	pages = {49--76},
+	publisher = {Ediciones Universidad Diego Portales},
+	timestamp = {2012.04.20},
+	title = {Introducci{\'o}n},
+	year = {2011}
+}
+
+@inbook{Silva2011,
+	author = {Silva, Patricio},
+	booktitle = {Notables tecn{\'o}cratas y Madarines. Elementos de sociolog\'{\i}a de las elites en Chile (1990-2010)},
+	chapter = {La elite tecnocr{\'a}tica en la era de la Concertaci{\'o}n (1990-2010)},
+	editor = {Joignant, Alfredo and G{\"u}ell, Pedro},
+	owner = {vicente},
+	pages = {241--270},
+	publisher = {Ediciones Universidad Diego Portales},
+	timestamp = {2012.04.20},
+	year = {2011}
+}
+
+@book{Stanworth1974,
+	editor = {Stanworth, Philip and Giddens, Anthony},
+	owner = {vicente},
+	publisher = {London, New York: Cambridge University Press},
+	timestamp = {2010.02.15},
+	title = {Elites and power in British society},
+	year = {1974}
+}
+
+@inbook{GiddensStanworth1974,
+	author = {Giddens, Anthony},
+	booktitle = {Elites and power in British society},
+	chapter = {Elites in the British Class Structure},
+	editor = {Stanworth, Philip and Giddens, Anthony},
+	owner = {vicente},
+	pages = {22--44},
+	publisher = {London, New York: Cambridge University Press},
+	timestamp = {2010.02.15},
+	year = {1974}
+}
diff --git a/bib/odonnel.bib b/bib/odonnel.bib
new file mode 100644
index 0000000..3e80f35
--- /dev/null
+++ b/bib/odonnel.bib
@@ -0,0 +1,35 @@
+@article{O’Donnel1,
+   title="Testing 1 O’Donnel",
+   author="Sean O’Donnel",
+   year="2019"
+}
+
+@article{O{\textquoteright}Donnel2,
+   title="Testing 2 O{\textquoteright}Donnel",
+   author="Sean O{\textquoteright}Donnel",
+   year="2019"
+}
+
+@article{O{\rq}Donnel3,
+   title="Testing 3 O{\rq}Donnel",
+   author="Sean O{\rq}Donnel",
+   year="2019"
+}
+
+@article{O‘Donnel4,
+   title="Testing 4 O‘Donnel",
+   author="Sean O‘Donnel",
+   year="2019"
+}
+
+@article{O{\textquoteleft}Donnel5,
+   title="Testing 5 O{\textquoteleft}Donnel",
+   author="Sean O{\textquoteleft}Donnel",
+   year="2019"
+}
+
+@article{O{\lq}Donnel6,
+   title="Testing 6 O{\lq}Donnel",
+   author="Sean O{\lq}Donnel",
+   year="2019"
+}