diff --git a/NEWS.md b/NEWS.md
index fa0d230..32f6f29 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,9 @@
+# citr 0.3.3
+
+- Prevented from duplicated file names which resulted in duplicated bibliography entries in the add-in  (@GegznaV, #67, #68)
+- Argument `encoding = getOption("citr.encoding")` is passed to `readLines()` in `insert_citation()` (@GegznaV, #68)
+
+
 # citr 0.3.2
 
 - Fixed bug related to use of absolute file paths that caused errors finding the bibliography files (reported by @bblodfon and @neurotroph, #52)
diff --git a/R/insert_citation.R b/R/insert_citation.R
index 86c6249..675e2ea 100644
--- a/R/insert_citation.R
+++ b/R/insert_citation.R
@@ -104,7 +104,7 @@ insert_citation <- function(
       stop("More than one parent document found. See getOption('citr.parent_documents').")
     }
 
-    parent_document <- readLines(parents_path[parents], warn = FALSE)
+    parent_document <- readLines(parents_path[parents], warn = FALSE, encoding = getOption("citr.encoding"))
     parent_yaml_delimiters <- grep("^(---|\\.\\.\\.)\\s*$", parent_document)
 
     yaml_bib_file <- get_bib_from_yaml(
@@ -795,7 +795,7 @@ get_bib_from_yaml <- function(yaml_delimiters, file_contents, rmd_path, bib_file
       file.path(rmd_path, yaml::yaml.load(yaml_front_matter)$bibliography)
       , tools::file_path_as_absolute
     )
-    c(bib_file, absolute_bib_file)
+    unique(c(bib_file, absolute_bib_file))
   } else {
     NULL
   }